| WO/2011/003002 | SYSTEMS AND METHODS FOR ZIPKNOT ACL FIXATION |
| WO/1998/022030 | SYSTEMS, METHODS, AND INSTRUMENTS FOR MINIMALLY INVASIVE SURGERY |
| WO/2002/038059 | TENSION BAND CLIP |
CLAIMS
1. Securing pin for tendon grafts is characterised by a head, a constant diameter body, at least one transverse hole at the tailing end and one longitudinal hole. 2. The securing pin according to claim 1 is characterised by one transverse hole at the tailing end for securing the graft..
3. The securing pin according to claim 1 is characterised by two transverse holes at the tailing end for securing the tendon graft, whose axes of symmetry are incompatible and are at an angle of 90 degrees to each other. 4. The securing pin according to claim 1 is charcterised by a slit along the length of the body up to the hole.
5. The securing pin according to claim 1 is characterised by an incomplete non-moving circular protrusion as head to secure the pin in the bone.
6. The securing pin according to claim 1 is characterised by the appropriate material be it metal or composite or ceramic biocompatible material. |
SECURING PIN FOR TENDON GRAFTS
This invention relates to a securing pin for tendon grafts which can secure tendon grafts in the correct direction.
Securing pins for orthopaedic grafts of such type do not exist. The available securing pins may be used in a horizontal mode, are of different shapes and require time consuming procedures during operation. The most serious disadvantage of the existing securing pins of a horizontal mode is the danger of inserting them in a wrong direction inside the bone, causing further damage to soft tissue after the graft is stressed in position. Also, another disadvantage of such securing pins is the long operating time they require and the difficult technique one has to master.
Another way of securing grafts is with threaded bolts, which compress the tendon graft inside a hole that has been drilled inside the bone. This method is not secure as well and poses the danger of damaging the graft by the treads of the securing bolt.
The advantages of this invention is that the graft is secured steadily, the securing pin can be applied easily and the reduction of the probability of damage of the soft tissue inside the bone. The securing pin of tendon grafts according to this invention is composed of a head, a constant diameter body, at least one transverse hole at the tailing end of the pin and one hole along the longitudinal axis.
Fig.l shows two bottom and two side views of this invention with two transverse holes, which are perpendicular to each other and incompatible, and a non-moving head. Fig.2 shows two views of this invention with one transverse hole and a non- moving head.
The length of the securing pin has a range between 20 and 45 millimeters with a constant diameter body (1 in figs.l, 2, 3 and 4) whose range is between 3 and 12 millimeters.
At the tailing end there is at least on transverse hole (2 in figs. 1, 1, 3 and 4) from where the graft is passed through, hi case where one transverse hole is not sufficient to secure the tendon graft, there can be two transverse holes (2 and 3 hi figs. 1 and 3) at the tailing end of the securing pin. In such a case, the axes of symmetry of the holes are incompatible and are at angle of 90 degrees to each other (2 and 3 hi figs. 1 and 3).
At the centre of the head there is a threaded hole (4 hi figs. 1 and 3) through which a protractor or an extractor can be applied. The hole is through the whole length of the securing pin and is also used by a guide which aligns the phi with the other appliances used during the orthopaedic operation.
The head restricts the insertion of the whole body of the securing pin into the bone. The head is comprised of an incomplete circular edge (5 hi figs. 1, 2 and 3) of 1 to 3 millimeter width. The securing phi for tendon grafts can be made of the appropriate metal or composite or ceramic biocompatible material.
The application of this invention is by inserting the securing pin for tendon grafts through a hole which has been drilled through a bone. The incomplete circular head does not allow the whole length of the securing phi to pass through the hole. The body of the securing pin passes through the drilled hole and the graft hangs on the tailing end hole. Following this the phi is driven through the hole with an attraction force applied at the other end of the graft.
Next Patent: SECURING APPLIANCE FOR TENDON GRAFTS