A DENTAL TEMPLATE FOR DIRECT BONDING ORTHODONTIC APPLIANCES AND METHODS OF MAKING AND USING THE SAME Background Orthodontic appliances such as brackets are used in orthodontic treatments for moving one or more teeth from an initial position (sometimes referred to as malposition or malocclusion) to a desired position in a patient’s dentition. For example, by using an orthodontic treatment the patient’s tooth may be moved such that their labial sides are aligned with each other to achieve or maximize an aesthetically pleasant appearance of the overall dentition. Further in some cases, one or more teeth may be moved to correct a malocclusion. The movement of teeth is typically achieved by a pre-biased elastic archwire, which is attached via brackets to the teeth, and which applies a force to the teeth toward the desired position over a longer time period. The ends of orthodontic archwires are often connected to small appliances known as buccal tubes that are, in turn, secured to the patient’s molar teeth. In many instances, a set of brackets, buccal tubes and an archwire is provided for each of the upper and lower dental arches of the patient. In many types of orthodontic techniques, the precise position of the orthodontic appliances on the teeth is an important factor for helping to ensure that the teeth move to their intended final positions. For example, one common type of orthodontic treatment technique is known as the “straight-wire” technique, where the archwire lies in a horizontal plane at the conclusion of treatment. If, for example, a bracket is attached to the tooth at a location that is too close to the occlusal or outer tip of the tooth, the orthodontist using a straight-wire technique will likely find that the tooth in its final position is unduly intruded. On the other hand, if the bracket is attached to the tooth at a location closer to the gingiva than is appropriate, it is likely that the final position of the tooth will be more extruded than desired. Certain treatment planning systems have been used to determine the desired position of the teeth in a computer simulation in advance of any actual treatment. Such a planning system helps for example for avoiding collisions between the teeth and brackets in tooth positions outside the initial position, and further allows for the brackets and the archwire to be designed and arranged to match with a variety of clinical situations, for example with the position of the teeth in the initial position, in the desired position, and positions between. For lingual brackets, such treatment planning is widely used. Lingual brackets often have a customized design individually for every tooth and patient because, other than the labial surfaces of a tooth, the lingual surfaces greatly vary in shape relative to each other so that a “one size fits all” bracket shape typically cannot be used. Some treatment planning systems also allow for designing such customized brackets which precisely match a tooth surface and the required clinical situations of a patient. Accordingly, customized brackets typically have to be precisely placed at positions on the teeth which are predetermined during the treatment planning. For facilitating a precise placement of the brackets on a patient’s teeth and for the orthodontist’s reference, the brackets are often provided prepositioned on a plaster model replicating the patient’s teeth. One example of a treatment planning software is disclosed in PCT Publication WO 2001/80761 “Interactive Orthodontic Care System Based on Intra-oral Scanning of Teeth.” As disclosed, the treatment planning software virtually superimposes brackets on teeth to generate a three-dimensional model comprising the three-dimensional tooth objects plus the virtual brackets at their intended locations. This three-dimensional model is supplied to a stereolithography (SLA) instrument for additive manufacturing a plastic model of the teeth with the brackets superimposed thereon. A thermoplastic foil is placed above the SLA model and the model and foil are placed within a pressure chamber. The chamber is pressurized so that the foil envelops the dentition and the brackets. The foil thus obtains small indentations where the brackets can be located. A plaster model on which the brackets are placed is sometimes used in orthodontics to make a so- called “transfer tray” for facilitating the placement of the bracket on a patient’s teeth. A transfer tray typically is adapted to hold a complete set of brackets at the predetermined position and allow the brackets to be placed and bonded on the teeth all at once, in one step, during “indirect bonding.” In general, indirect bonding techniques involved the use of a transfer tray having a shape that matches the configuration of at least part of a patient’s dental arch. A set of orthodontic appliances such as brackets are releasably connected to the tray at certain, predetermined locations. Adhesive is applied to the base of each appliance, and the tray is then placed over the patient’s teeth until the adhesive hardens. Next, the tray is detached from the teeth as well as from the appliances, with the result that all the appliances previously connected to the tray are now bonded to the respective teeth at their intended, predetermined locations. One example of a method of making a transfer tray for orthodontic appliances is disclosed in published European Patent Application No.12196586, “Mockup Representing a Dental Arch Including Analogs Approximating Orthodontic Brackets and Method of Making the Mockup.” Another example of a method of making a transfer tray for orthodontic appliances is disclosed in U.S. Patent No.9,763,750 “Rapid Prototyped Transfer Tray for Orthodontic Appliances.” Certain dental or tooth “templates” are used to permit an orthodontist to accurately place orthodontic appliances directly on teeth in a desired location. In one example, U.S. Patent No.6,905,337, “Tooth Templates for Bracket Positioning and Other Uses,” the templates are made from a flexible sheet of material adapted to be directly adhered to the surface of the teeth. The sheet of material is formed with the outline or shape of the tooth to allow the template to be adhered on the lingual surface of the tooth in a proper reference position. The sheet of material is also formed with one or more marks indicating the location of the orthodontic bracket on the tooth, for example one mark indicating the bracket base location and other marks indicating the orientation of the base and bracket slot. The marks indicating the bracket base are cut and punched out (using an EXACTO™ knife for example) or otherwise removed by the user from the sheet to provide a void in the template, enabling the user to directly bond the bracket to the tooth at the location of the void. In another example, U.S. Patent No.7,658, 610, “Systems and Methods for Fabricating a Dental Template with a 3-D Object Placement,” discloses a dental template to position an object on a patient’s tooth including digitizing the patient’s tooth, adding virtual objects (such as orthodontic brackets) to predetermined three-dimensional positions on the digitized tooth, and fabricating the dental template to locate the object at the predetermined 3D position on the patient’s tooth. In formation of the template, gingival portions, substantial parts of the lingual tooth surfaces, and/or bucco-gingival surfaces are removed. Although certain advances have been made in methods of predetermining locations of orthodontic appliances on a patient’s teeth and tools for placement thereof, additional advancements are desired by orthodontists and their patients. Summary This disclosure relates to dental templates for direct bonding orthodontic appliances to a patient’s teeth, methods of bonding orthodontic appliances to patient’s teeth, using a custom patient-specific mold body that optimizes the placement of the orthodontic appliances on the teeth. In one example, the disclosure is directed to a dental template comprising: a mold body for a patient-specific, customized fit with a plurality of teeth in the patient’s dental arch, the mold body having an exterior surface and an interior surface opposite the exterior surface and one or more custom- engineered compliant mechanisms within the mold body; and one or more guide apertures extending from the exterior surface to interior surface, the apertures including a substantially enclosed perimeter and configured to permit the placement of an orthodontic appliance on a surface of a tooth aligned with the guide aperture, when the mold body is registered on the dental arch, wherein after one or more orthodontic appliances are bonded to the surface of the teeth, a portion of the mold body is pivotable about the one or more of the custom-engineered compliant mechanisms to aid in removal of the mold body from the dental arch. Examples of a custom-engineered compliant mechanism include hinge, a pivot, a score line, a weakened portion, an engineered line of weakness, a line of concentrated stress, a frangible portion, a perforation, a bendable element, a thinner portion, a portion with lower modulus of strength, or a predetermined slot, void or gap. The compliant mechanism is located at a predefined location or locations on the patient-specific, customized dental template. In another example, the disclosure is directed to a dental template for direct bonding orthodontic appliances comprising: mold body for a patient-specific, customized fit with a plurality of teeth in the patient’s dental arch, the mold body having an exterior surface and an interior surface opposite the exterior surface, an occlusal portion, a first anchor portion having a custom-engineered compliant mechanism, and a second anchor portion; and one or more guide apertures extending from the exterior surface to the interior surface, the apertures including a substantially enclosed perimeter and configured to permit the placement of an orthodontic appliance on a surface of a tooth aligned with at least a portion of the guide aperture, when the mold body is registered on the dental arch, wherein after one or more orthodontic appliances are bonded to the teeth, the first molar portion of the mold body is pivotable about the custom-engineered compliant mechanism to aid in removal of the mold body from the dental arch. In yet another example, the disclosure is directed to a dental template for direct bonding orthodontic appliances, the dental template comprising: a mold body for a patient-specific, customized fit with a plurality of teeth in the patient’s dental arch, the mold body having an exterior surface and an interior surface opposite the exterior surface and one or more custom-engineered compliant mechanisms within the mold body; and one or more guide apertures extending from the exterior surface to the interior surface, the apertures including a substantially enclosed perimeter and configured to permit the placement of an orthodontic appliance on a surface of a tooth aligned with the guide aperture, when the mold body is registered on the dental arch, wherein the dental template has an installation state and a removal state, wherein during the installation state the dental template is positioned on the dental arch to guide the positioning and bonding of the orthodontic appliances on the patient’s teeth, and wherein during the removal state, at least one portion of the template is removed from the dental arch by pivoting at one of the custom-engineered compliant mechanisms. In another aspect, the disclosure is directed to methods of designing a dental template for direct bonding orthodontic appliances. In one embodiment the method comprises: receiving, by one or more processors, three-dimensional scan data of a tooth structure of a patient; designing, by the one or more processors, a custom dental template for direct bonding orthodontic appliances based on the three- dimensional scan data of the tooth structure of the patient, and the desired tooth structure of a plurality of teeth to receive an orthodontic appliance bonded to the patient, wherein the dental template comprises a mold body for a patient-specific, customized fit with a plurality of teeth in the patient’s dental arch, the mold body having an exterior surface and an interior surface opposite the exterior surface; one or more custom-engineered compliant mechanisms within the mold body of the custom dental template at a predefined location(s), and one or more guide apertures extending from the exterior surface to interior surface, the apertures including a substantially enclosed perimeter and configured to permit the placement of an orthodontic appliance on a surface of a tooth aligned with the guide aperture, when the mold body is registered on the dental arch, wherein a portion of the facial mold body is pivotable about the custom- engineered compliant mechanism at the predefined location to aid in removal of the mold body from the dental arch after one or more orthodontic appliances are bonded to the surface of the teeth. In another aspect, the disclosure is directed to methods of bonding appliances to teeth. In one embodiment the method comprises: providing a dental template comprising mold body for a patient- specific, customized fit with a plurality of teeth in the patient’s dental arch, the mold body having an exterior surface and an interior surface opposite the exterior surface; and one or more guide apertures extending from the exterior surface to interior surface, the apertures including a substantially enclosed perimeter and configured to permit the placement of an orthodontic appliance on a surface of a tooth aligned with the guide aperture, when the mold body is registered on the dental arch, wherein a portion of the facial mold body is pivotable about a custom-engineered compliant mechanism to aid in removal of the mold body from the dental arch after one or more orthodontic appliances are bonded to the surface of the teeth; placing the dental template on the patient’s dental arch; placing an orthodontic appliance on a tooth of the plurality of teeth through the guide aperture; bonding the orthodontic appliance to the labial surface; and removing the dental template from the patient’s dental arch pivoting a portion of the facial mold body about the compliant mechanism. Brief Description of the Drawings Figure 1 is a perspective view of an exemplary dental arch of a patient for use with a dental template of the present invention for direct bonding orthodontic appliances to the teeth of the patient; Figure 2 is a perspective view of an exemplary dental template of the present invention; Figure 3 is a perspective view of the dental template of Figure 2 on the dental arch of Figure 1; Figure 4 is a perspective view of the dental template and dental arch of Figure 3 after orthodontic appliances have been bonded to the teeth; Figures 5A-5B is a perspective view of the dental template and dental arch of Figure 4 as the dental template is being removed; Figure 6 is a perspective view of the dental arch and orthodontic appliances, after the dental template has been removed from the dental arch; Figure 7 is perspective view another exemplary dental arch of the present invention on the dental arch of Figure 1; Figures 8 perspective view of the dental template and dental arch of Figure 7 after orthodontic appliances have been bonded to the teeth; Figure 9 is an occlusal view of another exemplary embodiment of the dental template of the present invention; Figure 10 is an occlusal view of the dental template of Figure 9 on the dental arch of Figure 1; Figure 11 is an occlusal view of the dental template and dental arch of Figure 10 after orthodontic appliances have been bonded to the patient’s teeth; Figure 12 is an occlusal view of the dental template and dental arch of Figure 11 after an orthodontist has removed certain molar portions of the dental template; Figure 13 is an occlusal view of the dental template and dental arch of Figure 12, after the dental template has been completely removed from the dental arch; and Figure 14 is a block diagram illustrating a method of making a dental arch according to one embodiment of the invention. Detailed Description The primary objective of orthodontics is to move a patient’s teeth to a position where the teeth are esthetically pleasing. Orthodontic treatment may include standardized brackets and wires, such as those components in a “straight-wire” appliance system. Conventional orthodontic appliances such as brackets are positioned by hand by an orthodontist in defined positions and orientations according to standardized placement rules. The orthodontist may also visually gauge proper bracket positions and imagining treatment outcomes. After placement is determined, the brackets are then bonded by a small quantity of adhesive placed on the base of each bracket. The bracket may be bonded to the tooth using either a two-part chemical cure adhesive or a one-part light-cure adhesive. The uncured adhesive is sufficiently viscous and tacky to allow temporary adhesion and visual adjustment prior to final bonding. This method of bracket placement is known as “direct bonding.” To save time and ease of handling, some brackets are offered as Adhesive Pre-Coated (APC) commercially available from 3M Company, St. Paul, Minnesota, which include uncured adhesive on the bracket bases when they come from the factory. Once the orthodontic appliances are bonded on the teeth, the combination of the archwire and appliances adjusted over time move the teeth towards their intended final position. A skilled orthodontist may become very good at visually gauging proper bracket positions and imagining treatment outcomes for patients. However, it can take many years to acquire this skill, and even then, manual wire bends and bracket repositioning may be needed later in treatment to correct minor placement errors and achieve better results. The present invention provides dental templates for direct bonding orthodontic appliances. These dental template are formed using virtual treatment planning software often used in the indirect bonding process to provide accurate bracket placement, but include the advantage of direct bonding the appliances normally to the teeth surface, which provides good bond reliability. One possible disadvantage of indirect bonding is that the orthodontic appliance slides over the facial or lingual surface of the tooth in an occluso-gingival direction, thus smearing or wiping adhesive off the bracket base before coming to rest in its target position on the tooth. This may result in a poor bond between the orthodontic appliance and the tooth, requiring rebonding or replacements, ineffective treatment, or unintentionally consumed appliances. Another disadvantage of indirect bonding is that it requires the delicate additional step of preloading the orthodontic appliances into the transfer tray in such a way that they are releasably connected to the tray at certain, predetermined locations. The dental template of the present invention does not have the disadvantages of the indirect bonding tray and placement procedure. The dental templates of the present invention also provide more accurate placement of the orthodontic appliances, including more accurate measurement and analysis in comparison to direct bonding by hand. In addition, the dental templates and use thereof provides reduced doctor/patient time in the chair and better treatment outcomes. In fact, the orthodontist may be able to delegate the procedure for bonding the orthodontic appliances to another sufficiently qualified staff member because the planning of the position of each appliance is removed from the chairside procedure. Although the dental templates of the present invention do not allow for placement and bonding of the orthodontic appliances all at once, like indirect bonding procedures and templates, they allow for greater control over adhesive delivery because the orthodontic appliances are bonded one at a time, instead of all at once. For example, the dental templates provide greater control over the finer aspects of orthodontic placement, such as controlling of the potential excess of filled adhesive (i.e., flash) from around the base’s perimeter and forming a smooth film of adhesive between the base and the tooth. Also, if a bracket is lost or damaged by the patient, it can be easily re-bonded using the original dental template with a new bracket. In addition, compared to indirect bonding trays and placement procedures, the dental templates of the present invention provide greater visibility to more easily determine if the template and/or the brackets are positioned correctly on the teeth. This is because there is less material obscuring the brackets in visual reference to the teeth. Also, some indirect bonding trays, such as those formed from silicone, may be damaged after a single use due to the sharp undercut features of the brackets (e.g. hooks & tie-wings) tearing the bracket receptacles as the tray is removed after bonding. In other words, such trays can be damaged by a single use. This can potentially render the tray unable to hold brackets accurately in their intended positions when used to subsequently re-bond brackets due to bond failure or loss during treatment. In contrast, the dental templates of the present invention are reusable, providing the option to rebond certain brackets using the same dental template. Lastly, the dental templates may be difitally designed and printed using additive manufacturing to provide a patient specific customized dental template. Figure 1 illustrates an exemplary physical or virtual model of a dental arch 1 of a patient, which is useful for illustrating for use with a dental template of the present invention for direct bonding orthodontic appliances to the teeth of the patient. The dental arch 1 includes teeth 2, including facial surfaces 4 of the teeth, and gums 3, including gingival tissue. Figure 2 illustrates an exemplary dental template 10a of the present invention, which is used for direct bonding orthodontic appliances to a patient’s teeth. The dental template is specially designed to register and fit onto a specific patient’s dental arch. The dental template 10a includes a mold body 12 having an exterior surface 14 and an interior surface 16 opposite the exterior surface 14. The mold body 12 may include both a labial mold body 22 and a lingual mold body 24. The labial mold body 22 and lingual mold body 24 are designed to register or engage with at least a portion of the labial and lingual surfaces the individual patient’s teeth, respectively. The mold body 12 may include a gingival region and an occlusal region. The gingival and occlusal regions are designed to register or engage with at least a portion of the gingival and occlusal surfaces the individual patient’s teeth, respectively. The dental template 10a is designed to include desired mold bodies with certain regions, depending on the final desired orthodontic appliance placement on the individual patient’s teeth. Each dental template 10a is custom designed to fit a certain patient (“patient specific”), and thus has a customized fit with a plurality of teeth 2 in the patient’s dental arch. For example, for embodiments of mold body 12 that contact the facial surfaces 4 and/or occlusal surfaces of the teeth 2, the interior surface or inner surfaces 16 are contoured to match the corresponding facial tooth surfaces 4 and/or occlusal surfaces of the individual patient. For embodiments that include mold bodies 12 with contact the labial surfaces of the teeth 2, the interior surface or inner surfaces 16 are contoured to match the corresponding facial tooth surfaces 4 of the patient. For embodiments that include mold body 12 that contact the gingiva of the patient, the gingiva region 34 include interior or inner surfaces 16 contoured to match a portion of the corresponding gingiva of that individual patient. For mold body 12 embodiments that contact the molars of the teeth 2, the interior surface or inner surfaces 16 are contoured to match the corresponding molar surfaces of the individual patient. For instance, the molars might fit into certain cavities, as illustrated. For one full dental arch, the mold body 12 may include a first molar portion 26 and a second molar portion 28 opposite the first molar portion 26. Alternatively, the mold body 12 could include only one molar portion or no molar portions. That being said, the molar portions 26, 28 may serve as an anchor for the dental template 10a on the patient’s teeth. In another embodiment, the mold body 12 could include a molar portion on any of first, second and third molars. The molar portion may or may not include an aperture 20. Ideally, the dental template 10a is designed to have a comfortable snap fit with the patient’s teeth, similar to commercially available aligners. The dental template 10a may be designed to engage with all the teeth 2 in the patient’s mouth, or only select plurality of teeth, depending on which teeth are to bear an orthodontic appliance 60. For each tooth 2 that will receive an orthodontic appliance 60, there is a corresponding guide aperture 20 shaped to guide an orthodontist to a specific location on the adjacent tooth 2 to bond the appliance 60 at such position, when the mold body 12 is registered on an individual patient’s dental arch. Figures 2-5B illustrate a dental template 10a having one type of exemplary guide aperture 20, while Figures 7-8 illustrate a dental template 10b having another type of exemplary guide aperture 20. However, various shapes of apertures are envisioned, so long as it helps guide the orthodontist where to bond the appliances 60 on the teeth 2 at a predetermined location. The guide apertures 20a are designed to closely conform to the entire perimeter of the bracket base, and may possibly include a small tolerance for variation in the dimension of the bracket 60, bracket base, and/or dental template, or to allow the formation of the adhesive fillet surrounding the base where it mates with the tooth. As illustrated, the guide apertures 20b are enlarged along one or more edges to allow the brackets clearance as the dental template 10 is removed from the teeth. The guide apertures 20a, 20b include at least one surface or edge configured to engage an edge feature of the base of the corresponding orthodontic appliance 60. The surfaces or edges of each aperture 20a, 20b visually help guide the position and orientation of the bracket or orthodontic appliance 60 on the tooth surface, according to the digital treatment plan. Depending on the intended direction of motion of the surrounding portion of the dental template 10 during removal, different edges may be enlarged and by varying shapes and distances so as to avoid interference with the brackets 60. The dental template 10 may be considered to have two different states or conditions. Embodiments of the first condition are illustrated in Figures 2-4, Figures 7-8, and Figures 9-11, respectively. Embodiments of the second condition are illustrated in Figures 5A-5B and Figures 12-13, respectively. In the first condition, the dental template is in an “installation state” ready to be positioned on the dental arch to guide the orthodontist in positioning and bonding of the orthodontic appliances on the patient’s teeth. In the second condition, the dental template 10 is in a “removal state,” where at least one portion of the template has been removed from the dental arch by pivoting at one of the custom- engineered compliant mechanisms. The removal state is designed to facilitate easy removal of the dental template 10 from a patient’s dental arch 1 after the installation of one or more orthodontic appliances 60 to the surfaces of the teeth 2. All the Figures illustrate a mold body having guide apertures 20 for guiding the orthodontist in placing and bonding the appliances 60 on the labial surface of the patient’s teeth aligned with each corresponding guide aperture 20. However, the dental template of the present invention may also provide a mold body designed to assist in placing and bonding the appliances 60 on the lingual surface of the patient’s teeth aligned with each corresponding guide aperture 20. The guide apertures 20 are cut or molded into the dental template 10a. They extend from the exterior surface 14 to the interior surface 16 of the mold body 12, and thus provide an opening to receive the orthodontic appliances 60. Specifically, the guide aperture 20 is configured to permit the placement of an orthodontic appliance 60 on a surface of a tooth aligned with the guide aperture 20. Preferably, the guide apertures 20a include a substantially enclosed perimeter, as illustrated in the Figures. The substantially enclosed perimeter could be sized and shaped to closely outline the base of the specific orthodontic appliance 60 intended for placement therein. In another embodiment, the perimeter of the apertures 20a could be essentially enclosed. In another embodiment, the perimeter of the apertures 20 could be entirely enclosed. Examples of apertures 20a are illustrated in Figures 3-4. Alternatively, the substantially enclosed perimeter could be sized and shaped to help guide the orthodontist to bond the appliance 60 in a particular segment of the aperture 20b, which is another way to indicate the desired position of the appliance to be bonded to the tooth. In another embodiment, the perimeter of the apertures 20b could be essentially enclosed. In another embodiment, the perimeter of the apertures 20b could be entirely enclosed. Examples of apertures 20b are illustrated in Figures 7-8, which are discussed in more detail below. The enclosed perimeter of the apertures 20 can guide the orthodontist to where to bond the orthodontic appliances 60 on individual teeth. The ideal locations for each orthodontic appliance 60 on a tooth are predetermined by the design process described in more detail below. During the use of a dental template for direct bonding, an adhesive is typically applied to the base of each appliance 60 by the orthodontist or a staff member, though the dental template is also useful for pre-coated appliances. Suitable available orthodontic appliances are commercially available from 3M Company based in St. Paul. 3M Company provides ceramic orthodontic brackets commercially as 3M™ Clarity™ brackets, metal brackets commercially as Victory Series™ brackets, Unitek™ brackets, and SmartClip™ self- ligating brackets. In addition, suitable commercially available pre-coated orthodontic appliances or brackets are available from 3M Company based in St. Paul, Minnesota as APC™ brackets, APC™ PLUS brackets, and APC™ Flash-Free brackets. Regardless if a coat of adhesive is applied to the bracket base or if pre-coated appliances are used, each orthodontic appliance 60 is then placed through the guide aperture to contact the adhesive layer on the base of the appliance 60 onto the patient’s tooth, and it remains in place until the adhesive hardens. The dental template 10a allows the orthodontic appliance 60 to be applied at a direction generally perpendicular to the surface of the tooth 2, and in turn, helps minimize the potential to smear, or otherwise interference with, adhesives applied to the teeth during bonding. This situation may be encountered, for example, when using a two-component (or A/B type) chemical cure adhesive where one adhesive component is applied to the appliance and the other component is applied to the tooth. In contrast, with prior indirect bonding trays more adhesive smearing can potentially occur on the tooth side when the resultant physical transfer tray slides onto the patient’s teeth from the occlusal direction towards the gingival direction. It is generally desirable to reduce the degree of adhesive smearing, since smearing can deplete the amount of adhesive at the bonding site and thereby decrease bond reliability. Smearing can also leave an unwanted film of adhesive on portions of the teeth that are not being bonded. After removal of the dental template 10a, the adhesive used to bond each appliance 60 to the tooth is typically retained on the base of each appliance 60, and each appliance 60 is firmly bonded in its intended location. Figure 5A and 5B are convenient for illustrating the steps for removing the dental template 10a from the patient’s mouth, after the orthodontic appliances 60 are bonded to the teeth. To facilitate easy removal from the patient’s dental arch 1, the dental template 10a of the present invention also includes one or more custom engineered compliant mechanisms 18 designed into the mold body 12 at predefined locations. The compliant mechanisms 18 allow certain portions of the mold body 12 to pivot relative to each other around a planned radius. By pivoting the different portions of the mold body 12, this allows a user or orthodontist to easily remove the mold body 12 from the patient’s dental arch, after one or more orthodontic appliances 60 are bonded to the surface of the teeth. During the process of removal, a portion of the mold body 12 is rotated or bent away from the teeth of the patient, while another portion may stay registered on the teeth of the patient. This creates desired locations of space between the portions of the dental template 10a and the patient’s dental arch to allow at least certain portions of the dental template 10a to be removed successively, or for the entire dental template to be removed in one piece, without impacting the location or orientation of the appliance on a corresponding tooth surface. An engineered complaint mechanism 18 is different than a naturally occurring compliant mechanism, for instance in that it includes two aspects: (1) an engineered design and functionality of the mechanism and (2) an engineered location of the mechanism in the dental template. Both are developed strategically into the template to facilitate flex for easy and non-disruptive removal of the dental template from the patient’s arch, usually after one or more orthodontic appliances are bonded to the surface of the teeth. The engineered complaint mechanisms are customized by placing them at predefined locations of a patient-specific, customized dental template. In contrast, a naturally occurring compliant mechanism 18 may exist by virtue of a thermoforming process or natural topography of the dentition in a commercially available aligner. Suitable examples of custom-engineered compliant mechanism 18 include a hinge, a pivot, a score line, a weakened portion, an engineered line of weakness, a line of concentrated stress, a frangible portion, a perforation, a bendable element, a thinner portion, a portion with lower modulus of elasticity, or a predetermined slot, void, or gap. The compliant mechanism having one or more areas of weakness are engineered to concentrate stress and facilitate controlled bending, preferably with greater deflection resulting from lower applied forces. Another example of custom-engineered complaint mechanism 18 is breakable at a predefined location to aid in separating portions of the mold body 12 from the dental arch of the patient, after one or more orthodontic appliances are bonded to the labial surface of the teeth. For example, the mold body 12 could be made of a frangible material. In such case, the compliant mechanism itself becomes frangible and facilitates controlled breakage along engineered lines of weakness. In using the custom-engineered complaint mechanisms, selected portions of the dental template 10a may be removed successively, as illustrated in Figure 5A-B, or almost the entire dental template may be removed in substantially one piece, as illustrated in Figure 13. Also, the selected portions may be pivoted or flexed to bend away from the teeth and then the mold body 12 may be removed from the patient’s mouth in substantially one piece. As part of the design process, described in more detail below, custom-engineered compliant mechanisms 18 are located at certain predetermined locations, and often will include designed pivot axes. The Figures illustrate certain exemplary compliant mechanisms and accompanying pivot axes. The mold body 12 illustrated includes compliant mechanisms 18a-18d designed into certain predetermined locations. Compliant mechanisms 18a-18d are all in the form of slots or slits, but could be any of the other types described above. The complaint mechanisms 18a-18d divide the mold body 12 into five different portions, which may be removed sequentially from the patient’s mouth. The five portions are labeled first portion 72, second portion 74, third portion 76, fourth portion 78, and fifth portion 80. The compliant mechanisms 18a-18d each include a pivot axis (not shown) that is generally orientated in an occlusogingival direction. After the mold body 12 is registered on the dental arch 1, as illustrated in Figure 3, and after the orthodontic appliances 60 are bonded to the teeth through the guide apertures 20, the first portion 72 (also called the molar portion 26) of the dental template 10a may be pivoted along the axis of the complaint mechanism 18a, as illustrated in Figure 5A. In the embodiments shown, such as the one with elongated slits or perforations proximal the bracket apertures, the gingival portion of the appliance may need to pivot 45 degrees or more and stay in this position for the dental template 10a to clear the orthodontic brackets 60. The orthodontist may then break away first portion 72 from the second portion 74 remaining on the patient’s teeth, or simply disengage the first portion from the dental arch. Next, the gingival region 34 of the mold body 12 of the second portion 74 may be pivoted relative to the occlusal region 35 of the mold body 12 along the pivot axes of compliant mechanisms 18a- 18b. As illustrated in Figures 5A and 5B, the gingival region 34 between compliant mechanism 18a and complaint mechanism 18b is pivoted away from the dental arch 1, thus exposing the gingival side of the orthodontic appliances. This motion assists in removing both the labial and lingual mold bodies 22, 24 of the dental template 10a from the patient’s dental arch, but does not disturb the orthodontic appliances 60 bonded thereto. In another embodiment (not shown), the compliant mechanism could include a pivot axis that is generally mesial-distal, and the mold body includes a mesial region and a distal region. In this embodiment, the mesial region is pivotable relative to a portion of the distal region at the custom- engineered compliant mechanism. The dental template may include one or more hinges at predeterminate locations proximate the guide apertures, allowing a portion of the mold body to be pivotable about at least one of the hinges. Each guide aperture 20 has two custom-engineered compliant mechanisms 18e located on opposing sides of the aperture 20. In this exemplary case, the compliant mechanisms 18e are predetermined slots. The mechanisms 18e each include a pivot axis that is generally mesial-distal and are substantially parallel to each other. This design of complaint mechanisms 18e and accompanying pivot axes allow the orthodontist to rotate or pivot the gingival region 34 relative to the occlusal region 35 of the mold body 12. Next, the orthodontist may remove the third portion 76 of the dental template 10a by pivoting the gingival region 34 relative to the occlusal region 35 of the mold body 12 along the compliant mechanisms 18b and 18c. Again, this motion assists in removing both the labial and lingual mold bodies 22, 24 of the dental template 10a from the patient’s dental arch but does not disturb the orthodontic appliances 60 bonded thereto. Next, the orthodontist may pivot the fifth portion 80 (also the molar portion 28) of the dental template 10a along the axis of the complaint mechanism 18d, similar to how the first portion 72 was pivoted in Figure 5A. The portion 80 will then break away from the fourth portion 78 remaining on the patient’s teeth. Lastly, the orthodontist may remove the fourth portion 78 of the dental template 10a by pivoting or rotating the gingival region 34 relative to the occlusal region 35 of the mold body 12 between the compliant mechanisms 18c and 18d. This assists in removing the remaining labial and lingual mold bodies 22, 24 of the dental template 10a from the patient’s dental arch but does not disturb the orthodontic appliances 60 bonded thereto. After the dental template is removed from the teeth, the orthodontic appliances 60 are now bonded to respective teeth at their intended, predetermined locations, as illustrated in Figure 6. The template and method of using the template provide a way to efficiently direct bond orthodontic appliances 60 to a patient’s mouth in optimized locations. Although the first through fifth portions 72-80 are described as removed sequentially in a certain order above, any of the portions may be removed in any order determined by the orthodontist. Figures 7 and 8 illustrate another exemplary embodiment of the dental template of the invention. Dental template 10b is just like dental template 10a in Figures 2-5 with a few differences. First, the guide apertures 20b are sized and positioned differently within the mold body 12 compared to the guide apertures 20 in dental template 10a, even though the orthodontic appliances ultimately are bonded in the same locations, as shown in Figure 6. Second, the dental template 10b does not include any molar portions, but instead has two portions positioned over the first molar on each side of the dental arch that include a guide aperture 20c not having an enclosed perimeter. The guide apertures 20b include a certain portion shaped to generally correspond with the shape a portion of the corresponding orthodontic appliance, and have other portions of the guide aperture that provide relief areas or areas that are sized bigger than the orthodontic appliance. In the illustrated embodiment, the guide apertures 20b are sized and positioned to provide two perpendicular edges to assist the orthodontist in placing the orthodontic appliance 60 at the intended location on each patient’s tooth 2. The edges of each aperture 20b visually help guide the position and orientation of the bracket or orthodontic appliance 60 on the tooth surface, according to the digital treatment plan. In the illustrated exemplary embodiment, the apertures 20b each include a mesial-occlusal edge 30 configured to engage an edge feature of a corresponding orthodontic appliance. When the orthodontic appliance 60 is placed within the aperture 20b in this matter, a first relief area 32 is located in the gingival portion of the guide aperture 20b, and a second relief area 36 located in a distal portion of the guide aperture 20b. As a result, the first and second relief areas 32, 36 result in the guide window having greater geometric dimensions than a base of a corresponding appliance to aid in removal of the dental template 10b from the dental arch 1 after one or more orthodontic appliances 60 are bonded to the surface of the teeth 2. This larger space creates even more ease to remove the dental template 10b without disturbing the bonded orthodontic appliances 60. This configuration is especially helpful when the template 10b must clear any hooks and/or tie wings on the appliances 60 after they are bonded into place. In an alternative exemplary embodiment (not illustrated), the aperture 20b could a distal-occlusal edge configured to engage an edge feature of a corresponding appliance 60, a first relief area located in the gingival portion of the guide aperture and a second relief area located in a mesial portion of the guide aperture. The first and second relief areas would then result in the guide window having greater geometric dimensions than a base of a corresponding appliance to aid in removal of the band from the dental arch after one or more orthodontic appliances are bonded to the surface of the teeth. In other embodiments, the guide aperture 20b might include one edge segment or two edge segments that intersect and create a corner or even an intersection curved angle that engages the orthodontic appliance 60 in more than one direction. Dental template 10b includes three separate portions of the mold body that could be removed sequentially through the use of their corresponding custom engineered compliant mechanisms. The dental template 10b may be removed by first lifting it from the teeth 2 in an occlusal direction, then bending the posterior segments (first portion 72 and third portion 76) outward in a buccal direction. Then, the portions 72, 76 may be pivoted about the axis of the compliant mechanisms 18b, 18c posited between the lateral incisors and the canine, pulling forward to clear the anterior segment (second portion 74). The amount of clearance on the gingival side of each orthodontic appliance 60 is preferably greater than or equal to the vertical extent of the dental template 10b as it wraps around the incisal edges of the incisors and the marginal ridges of the canines, bicuspids, and molars. This allows the dental template 10b to clear these tooth edges and the gingival sides of the orthodontic appliances 60 almost simultaneously as the template 10b is pulled away from the facial surfaces of the teeth 2. The size or magnitude of the relief spaces 32, 36 could be somewhat reduced, if the template 10b is removed by pivoting about the incisal edges and marginal ridge lines, thus clearing the orthodontic appliances 60 before lifting the template 10b away from the teeth 2 in a generally occlusal direction. However, this technique may require the dental template 10b to be partially divided into several segments, 72, 74, 76 (as illustrated) to attain the flexibility needed for this compound rolling and bending motion. With the guide aperture 20b not having a fully enclosed perimeter located over the distal-most molars, this provides an easy way to remove the dental template 10b where it normally may be difficult to reach or where excess material is likely to interfere with the oral mucosa as it is lifted in a buccal direction. The shape of the guide apertures 20b are illustrated as having a particular shape on the gingival and distal sides, and actually extend slightly beyond the occlusal and mesial edges, in contrast to meeting them at right angles. This shape is to make it visually apparent to the orthodontist which two edges the orthodontic appliance 60 should be directly aligned with the mesial-occlusal edge 30. Figures 9-13 illustrate another exemplary embodiment of the dental template 10c of the present invention and use thereof. In this embodiment, the dental template has almost no wrap-around to the lingual surfaces of the teeth, which allows it to be removed more directly in a facial direction without pivoting or first lifting in an occlusal direction. To assist in keeping the dental template 10c stable and registered on the patient’s dental arch, two select portions almost entirely wrap around both the lingual and labial surfaces of two teeth. Preferably these select portions also include at least one opening 27 revealing an occlusal surface, to allow a dental pick or scaler to be inserted and hooked around the portion and facilitating its removal, after the orthodontic appliances 60 have been bonded to the patient’s teeth. Dental template 10c includes a mold body 12 for a patient-specific, customized fit with a plurality of teeth 2 in the patient’s dental arch 1. The mold body 12 has an exterior surface 14 and an interior surface 16 opposite the exterior surface 14. The mold body 12 also include an occlusal portion 23 and a labial portion 22. The occlusal portion 23 and a labial portion 22 extend over the occlusal surfaces and labial surfaces, respectively, of the plurality of teeth. The inner surface 16 of the mold body 12 is illustrated as configured to engage all teeth 2 of the dental arch, although this is not required. The inner surface 16 may optionally include a temporary adhesive layer to assist in adhering the dental template 10c to the patient’s teeth. For example, the adhesive could be a pressure sensitive adhesive, a wet stick adhesive, or denture adhesive. The dental template 10c may include guide apertures 20 just like those apertures 10a in Figure 2 and apertures 10b in Figure 7. Regardless of ultimate shape or size, the guide apertures 10c provide a visual guide for the orthodontist to bond the orthodontic appliances 60 to the ideal locations on the individual patient’s teeth 2. A customized dental template 10c is registered onto the dental arch 1 of the patient it is designed for. Then, the orthodontist bonds the orthodontic appliances 60 onto the patient’s teeth in the recommended positions through the guide apertures 20, as illustrated in Figure 11. The dental template 10c includes a first molar portion 26 and a second molar portion 28. Both molar portions 26, 28 have a custom-engineered compliant mechanism 18f, which is described in detail above relative to compliant mechanisms 18a-18e. In the embodiment shown in Figure 9, the compliant mechanism 18f is weakened portion, an engineered line of weakness. The mold body 12 may have a first thickness of material in regions remote from the areas away from the guide apertures 18f and a second thickness of material in regions surrounding the guide apertures 18f, and first thickness is greater than the second thickness. In one embodiment, the first thickness is at least 1.5 times thicker than the second thickness. It is possible that the dental template 10c may include one compliant mechanism 18f on only one of the molar portions 26, 28. The molar portions 26, 28 of dental template 10c also include a first labial sub-portion 26a, 28a, and a second lingual sub-portion 26b, 28b, with the compliant mechanism 18f therebetween, respectively. Compliant mechanism 18f has a generally anterior-posterior pivot axis. Alternatively, the dental template 10c could include additional custom engineered compliant mechanisms 18 illustrated in Figure 2. Compliant mechanisms 18f allow the labial and lingual portions 26b, 28b to pivot relative to adjacent portion 26a, 28a around a planned radius. By pivoting the different portions of the mold body 12, the user or orthodontist can easily remove the mold body 12 from the patient’s dental arch, after one or more orthodontic appliances 60 are bonded to the surface of the teeth. During the process of removal, the second lingual portions 26b, 28b of the molar portions are bent away from the teeth 2 of the patient, while the first labial portions 26a, 28a may stay registered on the teeth of the patient. Optional hooks 50 are useful for rotating the adjacent portion 26b, 28b about compliant mechanisms 18f. For instance, rotated portions 26b, 28b may be rotated or lifted using the clinician’s fingers. The rotated portions 26b,28b may then break off from the remaining molar portions 26a, 28b, as illustrated in Figure 12. Or, the rotated portions 26b, 28b may stay in the bent position. Regardless, either action creates desired locations of space between the dental template 10c and the patient’s dental arch to allow at least portions of the dental template 10c to be removed in in what remains as one piece, as illustrated in Figure 13. For example, the posterior portions of the mold body 12 may be bent outward in a buccal direction until the molar portions 26a, 28a are clear of the teeth, and then pulling the mold body 12 forward to clear the orthodontic appliances 60 on the anterior teeth. As described in more detail below as part of the design process, custom-engineered compliant mechanisms 18 are located at certain predetermined locations, and often will include designed pivot axes. The Figures illustrating certain exemplary compliant mechanisms and accompanying pivot axis designed at certain predetermined locations. Dental template 10c may be designed to include optional opening 27 on the first molar portion 26 and an optional opening 29 on the second molar portion 28. The openings 27, 28 are designed over the occlusal surface 40 of the patient’s molars 42. The openings allow an orthodontist to insert a dental instrument in the opening to help disengage and lift away the dental template 10c from the patient’s mouth after all the orthodontic appliances 60 have been bonded to the intended teeth. The customized, patient specific dental templates 10a-c provide an easy and reliable method of bonding appliances 60 to a patient’s teeth 2. The orthodontist places the dental template in the patient’s mouth and registers it onto the patient’s dental arch. Then, she places an orthodontic appliance 60 on a surface of the tooth 2 of the plurality of teeth through the guide aperture 20 and bonds the orthodontic appliance 60 to the surface of the tooth 2. After all the desired orthodontic appliances 60 are bonded to the intended teeth, a portion of the mold body 12 is pivotable or bendable about a custom-engineered compliant mechanism 18 as described above to aid in removal of the mold body 12 from the patient’s dental arch. Alternatively, the mold body 12 may be breakable at a predefined location to aid in separating portions of the mold body 12 from the dental arch, after one or more orthodontic appliances are bonded to the teeth. Although all Figures illustrate orthodontic appliances 60 bonded to all teeth, it is possible that the orthodontist may omit certain posterior teeth from treatment. In such cases, the dental template 10 would be designed to include the teeth intended for treatment and would use other teeth for anchorage, instead of the molars, for example the bicuspids. Dental templates 10 of the present invention are preferably made from elastomeric materials. For example, the mold body 12 of the dental template 10 could be made of a flexible silicone rubber, a low- modulus polyurethane or silicone RTV. With these materials, the dental template including guide apertures 20 could deform to a high percentage elongation to assist in clearing the orthodontic appliances 60 without exerting enough tensile or shear forces to de-bond the brackets. The guide apertures 20 may also be deformable to aid in the removal of the dental template 10. In some embodiments, dental templates 10 of the present invention are made from an elastic polymeric material that generally conforms to a patient's teeth, and may be transparent, translucent, or opaque. In some embodiments, the template 10 is a clear or substantially transparent polymeric material that may include, for example, one or more of amorphous thermoplastic polymers, semi-crystalline thermoplastic polymers and transparent thermoplastic polymers chosen from polycarbonate, thermoplastic polyurethane, acrylic, polysulfone, polyprolylene, polypropylene/ethylene copolymer, cyclic olefin polymer/copolymer, poly-4-methyl-1-pentene or polyester/polycarbonate copolymer, styrenic polymeric materials, polyamide, polymethylpentene, polyetheretherketone and combinations thereof. In another embodiment, the template 10 may be chosen from clear or substantially transparent semi-crystalline thermoplastic, crystalline thermoplastics and composites, such as polyamide, polyethylene terephthalate. polybutylene terephthalate, polyester/polycarbonate copolymer, polyolefin, cyclic olefin polymer, styrenic copolymer, polyetherimide, polyetheretherketone, polyethersulfone, polytrimethylene terephthalate, and mixtures and combinations thereof. In some embodiments, the template 10 is a polymeric material chosen from polyethylene terephthalate, polyethylene terephthalate glycol, poly cyclohexylenedimethylene terephthalate glycol, and mixtures and combinations thereof. One example of a commercially available material suitable as the elastic polymeric material, which is not intended to be limiting, is DURAN 3413, a clear sheet of polyethylene terephthalate, glycol modified (PETg), available from Scheu Dental Tech of Iserlohn, Germany. If the dental template 10 is made of a material having high modulus and low elongation, such as three-dimensional printed methacrylate resin, then the template is frangible and will break at the compliant mechanisms 18, such as a score line, a weakened portion, or an engineered line of weakness. If the dental template 10 is made of a material having a relatively lower modulus and higher elongation, such as thermoformed PETG, then the template will bend at the compliant mechanisms 18, but remain intact with the remaining of the template while allowing the portion to be removed from the patient’s moth. To form certain complaint mechanisms 18 a-e, excess material could be trimmed away after thermoforming, such as with a five-axis CNC mill, a LASER cutter or a water knife. The guide apertures 20 could be cut similarly. In a preferred embodiment, the mold body 12 of the dental template 10 is part of a tray, the tray having cavities sized and shaped to receive a plurality of teeth. For instance, the inner surface 16 of the mold body 12 includes a portion matching the contour of a corresponding labial tooth surfaces, and a portion matching the contour of a corresponding lingual tooth surfaces. As another example, the inner surface 16 of the mold body 12 is configured to engage all teeth of the dental arch, where the inner surface 16 includes a plurality of contour portions, with each portion matching the contour of a corresponding labial tooth surface. In another embodiment of the dental template of the present invention (not illustrated), template removal could be further assisted by having the template material along the gingival side of each guide aperture elevated in a facial direction by a distance sufficient to clear the brackets, when the dental template is removed from the patient’s teeth in an occlusal direction. Because the dental template would not contact the tooth surfaces along the gingival edges of the guide apertures 20, at least two of the other three edges would then be used as guides for the orthodontist. These edges could be the occlusal edge and at least a portion of one or both the mesial edge and the distal edge. The dental template 10 may be manufactured by a three-dimensional (3D) printing process (e.g. additive manufacturing), such as stereolithography (SLA). Alternatively, a suitable method of manufacture is thermoforming the dental template, followed by computer numerical control (CNC) trimming, or robotic trimming, of excess material, or to cut apertures, slots, perforations, or the like. Figure 14 is a schematic block diagram describing a workflow used to make a dental template for direct bonding orthodontic appliances on a patient’s teeth according to exemplary embodiments of the present invention. The first block, designated by the numeral 100, represents the step of providing a virtual model of a patient’s dental structure, as illustrated in Figure 1. This virtual model of the patient’s dental structure can be obtained using digital data provided using a hand-held intra-oral scanner such as the intra-oral scanner commercially available from 3M Company (St. Paul) as 3M™ True Definition Scanner. Alternatively, other intra-oral scanners or intra-oral contact probes may be used. As another option, the digital data may be obtained by scanning an impression or other negative replica of the patient’s dental structure. As still another option, the virtual model representing the patient’s dental structure may be obtained by scanning a positive replica of such dental structure or by using a contact probe on the positive replica. The positive replica used for scanning may be made by pouring a casting material (such as plaster of Paris or epoxy resin) into an impression of the patient’s teeth and allowing the casting material to cure. If scanning is used, any suitable scanning technique may then be used to obtain the virtual arch model representing the patient’s dental structure, including X-ray scanning, laser scanning, computed tomography (CT), and magnetic resonance imaging. Additional steps may be used to further refine the digital data before rendering the virtual arch model of the patient’s dental structure. For example, the digital data representing the virtual model may be additionally filtered or processed by removing erroneous data points. For example, STL (stereolithography) data files representing a tooth surface that include a data point significantly outside the normal expected geometrical relationship of adjacent data points could be fixed by STL-handling software to remove the erroneous data points. In addition, tooth data points that are missing could be added by software that manipulates STL files to create realistic, smoothly curved tooth shapes. In some embodiments, data processing is carried out before conversion of the data to an STL file. The workflow then proceeds to block 102, where one or more virtual orthodontic appliances are placed at desired locations on the teeth of arch model to form a composite model. For one embodiment of the present invention, the orthodontic appliances are represented by labial brackets. In an alternative embodiment, the orthodontic appliances are represented by lingual brackets. In yet another embodiment, the orthodontic appliances are represented by attachments for improving the engagement of Clear Tray Aligners (CTAs). Regardless, the orthodontic appliances including their overall shape and corresponding bases for attachment to the teeth are directly provided in the form of an STL file, or other digital image, by the appliance manufacturer. One suitable appliance manufacture is 3M Company based in St. Paul. 3M Company provides ceramic orthodontic brackets commercially as 3M™ Clarity™ brackets, metal brackets commercially as Victory Series™ brackets, Unitek™ brackets, and SmartClip™ self-ligating brackets, and brackets having uncured adhesive on the bracket bases commercially available as APC™ brackets, APC™ PLUS brackets, and APC™ Flash-Free brackets. Alternatively, the digital images representing the orthodontic appliances may be provided by scanning the physical appliance, or appliances, themselves. Preferably, the orthodontic appliances are exact virtual replicas of the physical appliances to be bonded to the teeth of the patient. The desired locations for the virtual orthodontic appliances on the teeth of the virtual dental arch model of the patient can be determined in any of a number of ways. In one example, the treating professional manually selects and places the virtual orthodontic appliances directly on the model using the local computer. In some embodiments, the modeling software treats each appliance and each tooth as a separate object within the 3D environment and fixes the position of each orthodontic appliance within the 3D space relative to a coordinate system associated with the tooth of the corresponding appliance. The modeling software can then, for example, virtually connect the virtual orthodontic appliances to a virtual archwire selected by the practitioner and compute the final positions of the teeth based on the positions of the orthodontic appliances and the selected archwire. The modeling software can then display the virtual teeth 12 in their final occlusion for review by the treating professional. If the treating professional is not entirely satisfied with the final predicted positions of the teeth, the treating professional may use the modeling software to manipulate one or more of the virtual orthodontic appliances relative to the virtual teeth. Based on these adjustments, the modeling software can again virtually connect the virtual orthodontic appliances to the virtual archwire, for example, to simulate the movement of teeth to new final positions. The new final positions of the teeth, determined by the positions of corresponding virtual appliances, are then computed and displayed for review. These steps can be repeated as many times as desired until the treating professional is satisfied with the final positions of the teeth as represented by the modeling software. As an alternative to moving appliances, the treating professional may instead use the modeling software to define the desired positions of teeth, and have the modeling software determine the suitable locations to place the virtual orthodontic appliances in order to move the teeth to those desired positions. Examples of virtual orthodontic treatment are disclosed in issued U.S. Patent Nos.6,739,869 (Kopelman et al.), 7,354,268 (Raby et al.) and 7,993,133 (Cinader, Jr. et al.), all of which are hereby incorporated. As another option, the steps in block 102 may be carried out by a technician at a location remote from the treating professional’s office. For example, a technician at the orthodontic appliance manufacturer’s facility may use the modeling software to place orthodontic appliances on the arch model based on standards or guidelines from an orthodontic treatment philosophy, such as for example that of Drs. MacLaughlin, Bennett, and Trevisi. These standards or guidelines for appliance placement may be specific to each tooth in model, and call out the position of the archwire slot (an occlusal-gingival height, for example) with respect to the clinical crown of each tooth. The technician may also place orthodontic appliances in accordance with particular instructions provided by the treating professional. Once the technician is satisfied with the orthodontic appliance positions and the resulting finished positions of the teeth, the model, together with the data representing the positions of orthodontic appliances, are transmitted to the treating professional for review. The treating professional can then either approve the technician’s appliance placement positions or reposition the orthodontic appliances as desired. As yet another option, the local computer can automatically suggest locations of orthodontic appliances on the teeth to the treating professional. Again, these proposed orthodontic appliance locations are optionally based upon an orthodontic treatment philosophy or other known standards or guidelines in the art. Examples of automatically placing virtual brackets on teeth are described in issued U.S. patent 7,210,929 (Raby et al.), 8,517,727 (Raby et al.) and 7,940,258 (Stark et al.), all of which are hereby incorporated by reference. As before, the treating professional has the opportunity to review the computer-proposed locations of orthodontic appliances and can either approve the placement positions or reposition the orthodontic appliances as desired. Next, block 106 illustrates the derivation of a mold body that a patient-specific, customized fit with a plurality of teeth in the patient’s dental arch and the desired locations for the selected orthodontic appliances when bonded to the teeth. In this embodiment, the derivation proceeds by defining a guidance line that extends across at least a portion of the arch. The guidance line follows a curved path that is generally parallel to the facial surfaces of the teeth and generally lies in an occlusal plane. However, one or more guidance lines may also be defined which traverse the occlusal or lingual surfaces of the arch. In one computer-assisted embodiment, the guidance lines are defined by tracing a line segment that connects the facial-most edges of teeth as viewed from the occlusal direction, offsetting the line segment outwardly towards the facial direction by a certain distance and then applying a smoothing operation to the line segment. The process in block 106 continues by defining a series of fitted arcs, each of which extends over the lingual, occlusal, and facial surfaces of the virtual model of the teeth in the dental arch and intersects each guidance line in a generally perpendicular relationship such that each fitted arc passes over without contacting the model. In this example, each fitted arc is generally semi-circular in shape and begins at a location lingual relative to the teeth and terminates at a location facial to the teeth. The outer surface of the model represents the exterior surface of the mold body and may be formed by fitting a surface to the set of fitted arcs. In some embodiments, the outer surface is an open- ended shell that completely covers the occlusal, lingual, and facial sides of the assembly that includes the model, desired locations for the appliances intended to be later bonded through the guide apertures, and desired custom-engineered compliant mechanisms, as discussed above, which will aid in the removal of the mold body from the dental arch. Optionally, a surface smoothing operation is subsequently executed on the outer surface. Then, a virtual mold body is derived using the outer surface. When virtually aligned with the virtual arch model, the mold body surrounds both the teeth, provides optimized locations for the orthodontic appliances to be later mounted through guide apertures, and provides locations and shapes of the custom-engineered complaint mechanism to be used later in removal of the mold body from the dental arch, after the orthodontic appliances are bonded to the surface of the teeth. Next, there is a virtual subtraction of the specific patient’s dental structure model to produce a virtual mold body precursor. The mold body precursor includes the mold body, which now has a shell- like configuration and further includes locations for the guide apertures, formed by the bases of the negative virtual imprints of the selected orthodontic appliances and locations for the custom-engineered appliances. In block 106, a finished virtual dental template is produced by trimming the mold body to create a gingival edge, guide apertures shaped to allow placement of the intended orthodontic appliances on the surfaces of the selected teeth, and custom-engineered compliant mechanisms that will aid in removal of the bold body from the dental arch, after one or more of the orthodontic appliances are bonded to the surface of the teeth. This may be accomplished by defining custom engineered complaint mechanisms and either guide apertures shaped to equally surround the base of the orthodontic appliance, as illustrated by guide apertures 20a in Figures 2-4, or enlarged guide apertures having only certain edges to engage an edge feature of a corresponding orthodontic appliance, as illustrated by guide apertures 20b in Figures 7 and 8, or some combination thereof. It is noted that the above steps in blocks 102,104 represent just one possible sequence of steps used to produce the finished virtual dental template. Further steps or substitutions of the above steps may be used to accomplish the same result. Moreover, the steps described need not be executed in the exact order shown above. Block 108 shows the fabrication of a physical mold body from the virtual mold using additive manufacturing techniques. As used herein, “additive manufacturing” is a process that takes virtual designs from Computer Aided Design (CAD) or other modeling software, transforms them into a series of thin, virtual, horizontal cross-sections and then re-constructs each cross-section in physical space, one after the next until the model is finished. For example, an additive manufacturing machine may read in data from a CAD drawing and lay down successive layers of liquid, powder, or sheet material, in order to build up the physical model. By automatically aligning and fusing together a series of cross-sections, the virtual model and physical model can correspond almost identically. Advantageously, the layer-by-layer aspect of rapid prototyping allows the creation of nearly any shape or geometric feature. As an added benefit, rapid prototyping also provides flexibility to fabricate articles that include two or more interpenetrating components with substantially different material properties. Particular examples of “additive manufacturing” techniques include, but are not limited to, three- dimensional (3D) printing, selective area laser deposition or Selective Laser Sintering (SLS), electrophoretic deposition, robocasting, Fused Deposition Modeling (FDM), Laminated Object Manufacturing (LOM), stereolithography (SLA) and photostereolithography. Issued U.S. Patent Nos. 5,340,656, 5,490,882, 5,204,055, 5,518,680, 5,490,962, 5,387,380, 5,700,289, 5,518,680, and 4,672,032 describe examples of suitable additive manufacturing techniques (also known historically and in certain applications as “rapid prototyping” techniques). Particularly suitable additive manufacturing machines include the VIPER brand SLA system from 3D Systems (Rock Hill, SC) and EDEN brand 500V printer from Objet Geometries Ltd. (Rehovot, ISRAEL). Once fabricated, the resulting physical mold body will be the finished dental template of the present invention, including all designed-in guide apertures and one or more of the custom-engineered compliant mechanisms for a specific patient. The dental template may then be used by the orthodontist to direct bond the selected orthodontic appliances onto the patient’s teeth, as discussed in detail above. Alternatively, the workflow could include first the step of additive manufacturing the physical mold body in block 108 followed thereafter by trimming the resulting physical mold body to include the prior designed guide apertures and compliant mechanisms as represented by block 110. One example of a suitable trimming tool is a Roland DWX-505-Axis Dental Milling Machine, available from Roland DGA Corporation (Irvine, California). The complete disclosures of the patents, patent documents, and publications cited herein are incorporated by reference in their entirety as if each were individually incorporated. A number of other variations, modifications and additions are also possible without departing from the spirit of the invention. Accordingly, the invention should not be deemed limited to the specific embodiments described above, but instead only by a fair scope of the claims that follow and their equivalents.