KR200381316Y1 | 2005-04-14 | |||
US4689010A | 1987-08-25 | |||
US5513985A | 1996-05-07 | |||
US5316474A | 1994-05-31 |
Claims
1 . A dental impression bite tray comprising, in combination:
a handle for an impression obtainer to hold, a right impression
obtaining wall beside the handle to support the impression materials, a
connecting loop, and a left impression obtaining wall. In addition, the
present invention include a moving freely prevention projection in a jagged
shape on the left and right sides inside the impression obtaining walls to
prevent a moving freely of impression materials and an impression
obtaining membrane to provide a space for impression materials on the
central portion of the impression obtaining walls.
The present invention, as a plastic-made dental impression bite tray,
is characterized by possessing a metallic reinforcement to strengthen the
connecting loop, an impression obtaining membrane inside the reinforcement,
and a moving freely prevention stair to stick the plastics and the
reinforcement together so that they cannot move separately. The connecting
loop connects the left and the right side of the impression walls, and the
metallic reinforcement is inserted by exposing to the outside of the left side
of the connecting loop.
2. The dental impression bite tray of claim 1 wherein the present invention is characterized by providing an impression obtaining membrane inside a
reinforcement and various moving freely prevention grooves in a certain
distance. The moving freely prevention grooves fix the plastics and the
reinforcement and prevent their separate movement.
3. The dental impression bite tray of claim 1 wherein the present invention
is characterized by providing an impression obtaining membrane that is
made up of nonwoven fabric.
4. The dental impression bite tray of claim 1 wherein the present invention
is characterized by providing an impression obtaining membrane that is
made up of meshes.
5. The dental impression bite tray of claim 1 or claim 2 wherein the
present invention is characterized by providing the materials for the
reinforcement chosen from one of these: brass, brass alloys, aluminum,
aluminum alloys, stainless steels, zinc alloys, general metals, and die casting
moldings.
6. The dental impression bite tray of claim 1 wherein the present invention
is characterized by providing supporters, to strengthen the handle, on the both sides of the handle.
7. The dental impression bite tray of claim 1 wherein the present invention
is characterized by providing a whole on the handle to hang the tray (on a
peg or a pin). It prevents damaging the impression materials after the
impression obtaining.
8. The dental impression bite tray of claim 1 wherein the present invention
is characterized by forming a perpendicular rib shaped moving freely
prevention projection in a jagged shape. The moving freely prevention
projection is to prevent a moving freely of the impression materials when
obtaining a dental impression and locates the inner surface on the left and
right sides of the impression obtaining walls. |
TITLE O-F INVENTION
Dental Impression/Bite Tray '
-Technical Field-
The present invention is referred to the disposable bite trays among the
_f dental impression trays, a metallic reinforcement is added to the
connecting loop on the both sides of the impression walls of the plastic
tray. The reinforcement, produced thinly and narrowly, was exposed to
the exterior, and, the both ends of the reinforcements were fixed by
inserting to the impression walls. The reinforcement was also inserted to
/ o the inside of the central portion on the impression membrane and
fixed with the plastic supporter. This structure would keep the merits
of the conventional-plastic disposable bite tray, which is that the
impression membrane inside of the connecting loop does not move up
and down, and, the moving freely prevention stair and the moving freely
/ f prevention grooves help obtaining the impression finely and
elaborately. The use of these reinforcements make the connecting loop,
which is the weakest part of the tray, strong and rigid, even if the
disposable bite tray is made up of plastics. In addition, the present
invention complements the weakness of the conventional-plastic disposable
o bite tray. The width of the invented tray is adjustable as a metallic tray,
the impression walls can be crossed, and the strength and rigidness of the
invention prevent the deformation of the impression materials.
-Background Art-
In order to prepare a dental prosthetic appliance, generally, a
£ patient's intra-oral dental-impression needs to be obtain. The instrument
using in this process is called a dental impression tray, also called a bite
tray in a technical term. The bite tray consists of a hollow structure to
retain impression materials, which is to obtain an intra-oral impression for
patient's dental prosthesis, and a handle fixed to the hollow structure. The
/ o structure of this bite tray is useful for the method of extrusion, blow
molding, injection molding, compression molding and vacuum molding. Most
dentists in Korea and other advanced countries use disposable bite trays
because of their hygiene and convenience. The disposable trays made up of
cheap and easy-to-make materials, such as fibers, films, PP (polypropylene),
/ f- and ABS resin, and etc..
However, the plastic-made disposable bite trays result in the
following problems.
no matter how strong plastics those are used, the connecting loops of the
impression obtaining walls on the both sides of the tray will still be thin
o and narrow. It is because the connecting loops go into the inner space
where maxillary and mandibular molars occlude, and so they have to be
thin and narrow. In this case, the connecting loops of the impression
obtaining walls can become weak and may result in twist or warp of the
impression materials when obtaining the dental impression. These deformed
f impression materials may make difficult to obtain an elaborate teeth
impression.
Therefore, in the present invention, the metallic reinforcement was added to
the connecting loop of the plastic tray. This will make the plastic tray rigid
as a metal tray and make adjustable. For instance, dentists may be able to
/ o adjust the width of the tray or cross the impression obtaining walls. This
customized tray will provide a safe disposable bite tray to obtain an
elaborate teeth impression.
-Disclosure of invention-
In the present invention, a metallic reinforcement is added to the connecting
/t loop on the both sides of the impression walls of the plastic tray. The
reinforcement, produced thinly and narrowly, was exposed to the exterior,
and, the both ends of the reinforcements were fixed by inserting to the
impression walls. The reinforcement was also inserted to the inside of the
central portion on the impression membrane and fixed with the plastic
■ x> supporter. This structure would keep the merits of the conventional-plastic
disposable bite tray, which is that the impression membrane inside of the
connecting loop does not move up and down, and, the moving freely
prevention stair and the moving freely prevention grooves help obtaining the
impression finely and elaborately.
C The disposable bite trays are usually made up of plastics because they are
easy-to-make materials, cheap, and convenient to use. However, no matter
how strong plastics those are used, the connecting loops of the impression
obtaining walls on the both sides of the tray will still be thin and narrow.
It is because the connecting loops go into the inner space where maxillary
/ o and mandibular molars occlude, and so they have to be thin and narrow. In
this case, the connecting loops of the impression obtaining walls can
become weak and may result in twist or warp of the impression materials
when obtaining the dental impression. These deformed impression materials
may make difficult to obtain an elaborate teeth impression.
/.T Therefore, in the present invention, the metallic reinforcement was added to
the connecting loop of the plastic tray. This will make the plastic tray rigid
as a metal tray and make adjustable. For instance, dentists may be able to
adjust the width of the tray or cross the impression obtaining walls. This
customized tray will provide a safe disposable bite tray to obtain an
o elaborate teeth impression.
-Brief Description of Drawings-
The following figure-descriptions are regarded to the present
invention.
Figl is a side view of the dental impression bite tray.
( ■ Fig2 is a plan view or the dental impression bite tray.
Fig3 is a side view of the reinforcement, which is fixed in the
central portion both sides of the impression obtaining walls.
Fig4 is a cross-section view of A-A line shown in Fig3.
Fig5 is another side view of the reinforcement,
/ o ** Description for the main parts of the drawings **
100 : Dental Impression Bite Tray,
110 : Handle,
120 : Impression obtaining wall,
122 : Metallic reinforcement,
/f" 124 : Moving freely prevention projection for impression materials,
130 : Impression obtaining membrane,
140 : Central portion,
150 : Moving freely prevention stair,
150a : Moving freely prevention grooves
> e 160 : Reinforcement-membrane supporting plastic area.
170 : Supporter to strengthen the handle.
-Best Mode for Carrying Out the Invention-
To solve the prenominate problems, the structure of the present
invention characterizes with the following components: a handle and its
supporter; an impression wall supporting impression materials; an impression
ζ membrane in the central portion of the impression wall, providing a hollow
space to retain impression materials for obtaining the impression; retentive
components, reinforcement, fixed by either inserting to the inner surface or
exposing to the outer surface; and a moving freely prevention stair with a
rough surface to link the impression membrane to the reinforcement.
/o For the impression membrane, it is better to use a nonwoven fabric
or mesh than a woven fabric because a nonwoven fabric or mesh has tight,
irregular and airy fibrous tissue. Due to this fiber structure, the nonwoven
fabric or mesh shows a strong penetration and sticking when it connects to
the impression materials, so that the impression materials can easily
/ t separate from the impression wall.
Silicons and alginates are two common resources using for the dental
impression materials. When using alginates, it can be very watery. The
impression membrane needs to be hard enough to support the impression
materials, otherwise, the membrane can be torn. When using silicons, the
>o occluding force and saliva can make the partition weak. For these reasons,
the nonwoven fabric needs a proper thickness, range of 0.003 ~0.006 inch.
In the case of using plastic impression walls for this invented tray,
the following harmless materials are recommended for the reinforcement in
the central portion. The recommending materials are brasses, aluminiums,
stainless steels, brass alloys, zinc alloys, general metals, and die casting
ς moldings. These materials will help maintaining the original wall of the
teeth impression acquisition disposable bite tray and preventing it from
distorting. When the reinforcement in the central portion of the outer
surface are exposed to the exterior, the rough surface for the moving freely
prevention stair and various moving freely prevention grooves are necessary
/o to unify the impression membrane and the reinforcement. In this way, the
invention will provide a safe and useful dental impression tray.
The moving freely prevention projection for impression materials
should be formed in a jagged shape on the inner surface of the prenominate
impression wall. The jagged shape will prevent the moving freely of the
/ f impression materials when obtaining the dental impression.
The moving freely prevention projection for impression materials in a
jagged shape may be produced in two ways. One is that both sides are
slant to the interior with a certain angle in a diamond shape. Another is
that which both sides are slant from the exterior to the interior in an
o inverse-diamond shape, wave shape, jagged shape, or a perpendicular shape.
The moving freely prevention projection for the prenominate
impression materials may also be formed to preserve the established angle
with keeping the jagged or the semicircular shape.
For the impression mold, various grooves may formed on the inner
ξ surface of the wall to prevent the moving freely of the impression materials.
The grooves are to carry the impression materials and may be formed
horizontally to the moving freely prevention projection with a certain depth
or with apertures.
The invention will be more specifically explained by reference to the
/o following drawings.
Fig 1 is a plan view of the invented dental impression bite tray.
Fig 2 is a side view of the invented dental impression bite tray.
Fig 3 is a side view of the fixed metallic reinforcement, which is inserted
to the central portion of the impression mold of the invented dental
ffr impression bite tray.
Fig4 is a cross-section view of A-A line shown in Fig3.
Fig5 is another side view of the metallic reinforcement.
The present invention, dental impression bite tray (100) is embodied
in the apparatus shown in Figl or Fig3. The embodiments are as follows: a
yfr handle (110) for a patient and the left and the right side of the impression
obtaining wall (120), which supports a side of the impression materials and
locates beside of the handle (110); an impression membrane (130) in the
central portion of the impression obtaining wall (120), to provide a hollow
space for retaining impression materials; a supporter (170) to strengthen the
handle (110); a central portion (140) that is linked to the left and the right
ζ side of the impression obtaining wall (120) in a hook shape; reinforcements
(122) equipped on the inner and outer surface; and a moving freely
prevention stair (150) that prevents interior moving freely of the
reinforcement (122), which connect and unify the central portion (140) and
the impression membrane (130).
/° The handle (110) and the impression obtaining wall (120) are made
up of plastics. The materials used for the handle (110) and the impression
obtaining wall (120) of the dental impression bite tray (100) are undoubtedly
harmless. The material was selected from plastics, brasses, aluminiums,
aluminium alloys, stainless steels, brass alloys, zinc alloys, general metals,
/ f and die casting molding elements. These materials are absolutely harmless
and maintain the firmness of the handle (110) and the impression obtaining
wall (120).
The thickness of the impression membrane is suggested to be 0.003
0.006 in, so that it can hold the impression materials and make an easy
κ> acquisition. This thickness range complements the official technique which
presents a thickness of less than 0.003 in. The 0.003 inch-impression
membrane is too thin and easily torn to obtain the impression materials,
therefore, the thickness of the membrane is improved to the range of 0.003
~ 0.006 in, which is the optimum condition.
The nonwoven fabrics or mesh are recommended to make the
ξ- impression membrane (130) because the impression membrane (130), made
up of nonwoven fabrics or mesh, not only helps to maintain the shape of
the impression obtaining wall (120), but also helps the impression materials
separate easily from the impression obtaining wall (120) after obtaining the
impression. The improved impression membrane (130) also diversifies the
fo impression materials that are easy to separate from the impression obtaining
wall (120).
The plastic impression obtaining wall (120) of the dental impression
bite tray (100) include reinforcements (122) prepared on the interior and
exterior of the central portion (140). The component for the reinforcements
ft (122) is selected from the following lists of the harmless materials. The
lists include brass, aluminiums, stainless steels, brass alloys, zinc alloys,
general metals, and die casting moldings. These materials will help
maintaining the original wall of tray and preventing it from distorting, to
obtain the dental impression safely and easily.
>β The jagged shape moving freely prevention projection (124) for
impression materials is formed perpendicularly on the inner surface of the
impression obtaining wall (120). This formation of the moving freely
prevention projection (124) may minimize the moving freely of the
impression materials forcing out to the direction of the tray's length.
The moving freely prevention projection for impression materials in a
f jagged shape may be produced in two ways. One is that both sides are
slant to the interior with a certain angle in a diamond shape. Another is
that which both sides are slant from the exterior to the interior in an
inverse-diamond shape, wave shape, or a jagged shape.
The moving freely prevention projection for the prenominate
to impression materials may also be formed to preserve the established angle
with keeping the jagged or the semicirclular shape.
For the impression mold, various grooves may formed on the inner
surface of the wall. The grooves are to carry the impression materials and
may be formed horizontally to the moving freely prevention projection with
/f a certain depth or with apertures.
The plastic and impression membrane moving freely prevention stair
(150) should be prepared on the inner surface of the reinforcement (122)
occluding the impression wall (12) and the circular-central portion (140).
The moving freely prevention stair (150) is to prevent the moving freely of
>o the plastic- supporting area (160), which supports the impression membrane
(130). The moving freely prevention stair (150) can substitute to the moving
freely prevention groove (150a), which is formed with grooves in a certain
distance, not a continuous groove.
The present invention has now been described with desirable
reference, however, the scope of the present invention should not only be
J " limited to the structures described in this application, but also by structures
described by the language of the claims and the equivalents of those
structures.
-Industrial Applicability-
In the present invention, a metallic reinforcement is added to the connecting
/CJ loop on the both sides of the impression walls of the plastic tray. The
reinforcement, produced thinly and narrowly, was exposed to the exterior,
and, the both ends of the reinforcements were fixed by inserting to the
impression walls. The reinforcement was also inserted to the inside of the
central portion on the impression membrane and fixed with the plastic
/ 1 supporter. This structure would keep the merits of the conventional-plastic
disposable bite tray, which is that the impression membrane inside of the
connecting loop does not move up and down, and, the moving freely
prevention stair and the moving freely prevention grooves help obtaining the
impression finely and elaborately. The use of these reinforcements make the
;2o connecting loop, which is the weakest part of the tray, strong and rigid,
even if the disposable bite tray is made up of plastics. In addition, the
present invention complements the weakness of the conventional-plastic
disposable bite tray. The width of the invented tray is adjustable as a
metallic tray, the impression walls can be crossed, and the strength and
ζ ~ rigidness of the invention prevent the deformation of the impression
materials. It is also possible to make various models, such as posterior,
half-side, sideless, quadrant, using the reinforcement for the disposable bite
ray, so that dentists can use the disposable bite tray that is suitable for
them, and prepare a safe and elaborate impression obtaining.
/ 1>