Background Osteogenic proteins, also referred to as bone morphogenetic, or morphogenic proteins BMPsare a family of bone-matrix polypeptides isolated from a variety of mammalian species. Implantation of OPs induces a sequence of cellular events that lead to the formation of new bone. Some of the potential clinical applications of OPs are:
Provisional Patent Application Ser. Such injuries are generally the result of excess stress being placed on the tissues.
If, Alphatec electronics pcl, the ligament or tendon is completely detached from its associated bone or bones, or if it is severed as the result of a traumatic injury, partial or permanent disability may result.
Such traditional attachment devices have also been used to attach tendon or ligament grafts often formed from autogenous tissue harvested from elsewhere in the body to the desired bone or bones.
Another procedure is described in U. Next, a graft ligament, with a bone block on one of its ends, is sized so as to fit within the bone tunnels. Suture is then attached to the bone block, and the suture is thereafter passed through the tibial tunnel and then the femoral tunnel.
The bone block is then drawn up through the tibial tunnel and up into the femoral tunnel using the suture.
As this is done, the graft ligament extends back out the femoral tunnel, across the interior of the knee joint, and then out through the tibial tunnel. The free end of the graft ligament resides outside the tibia, at the anterior side of the tibia. Next, a bone screw is inserted between the bone block and the wall of femoral bone tunnel so as to securely lock the bone block in position by a tight interference fit.
Finally, the free end of the graft ligament is securely attached to the tibia. Marlowe Goble, there is disclosed a procedure wherein aligned femoral and tibial tunnels are formed in a human knee.
A bone block, with a graft ligament attached thereto, is passed through the tibial and femoral tunnels to a blind end of the femoral tunnel, where the block is fixed in place by an anchor. The graft ligament extends out the tibial tunnel, and the proximal end thereof is attached to the tibial cortex by staples or the like.
Alternatively, the proximal end of the ligament may be fixed in the tibial tunnel by an anchor or by an interference screw. A number of these devices are described in detail in U. In this respect it should be appreciated that the cross-pin i.
In order to provide for proper cross-pinning of the bone block in the bone tunnel, a drill guide is generally used. The drill guide serves to ensure that the transverse passageway is positioned in the bone so that the transverse passageway intersects the appropriate tunnel section and hence the bone block.
Drill guides for use in effecting such transverse drilling are shown in U. Other patents in which cross-pinning is discussed include U. Cross-pinning methods and apparatus currently exist for fixing a graft ligament in a femoral bone tunnel.
However, the femoral cross-pinning methods and apparatus that are presently known in the art do not address the use of a cross-pin in a tibial bone tunnel, which involves a different set of considerations. Among these considerations are anatomical geometries, bone configurations, bone quality, etc.
Accordingly, there exists a need for a method and apparatus for positioning at least one cross-pin so as to fix a graft in a tibial bone tunnel. There also exists a need for a method and apparatus for positioning at least one cross-pin across a tibial tunnel such that, upon completion of the procedure, the cross-pin is located in the cortical portion of the tibia, adjacent to the tibial plateau.
Another object of the present invention is to provide a novel method and apparatus for positioning at least one cross-pin across a tibial tunnel such that, upon completion of the procedure, the cross-pin is located in the tibia and, more preferably, in the cortical portion of the tibia, adjacent to the tibial plateau.
These and other objects of the present invention are addressed by the provision and use of a novel method and apparatus for fixing a graft in a bone tunnel. In accordance with a feature of the present invention, there is provided apparatus for positioning at least one cross-pin in a bone through a bone tunnel, the apparatus comprising: In accordance with a further feature of the present invention, there is provided a method for fixing a ligament in a bone tunnel, the method comprising the steps of: In accordance with a further feature of the present invention, there is provided an apparatus for positioning at least one cross-pin in a bone through a bone tunnel, the apparatus comprising:Alpha offers innovative powering solutions that are designed for the future; built to support expansion and provide unlimited opportunity.
Widely used in cable television, communications and data networks worldwide, Alpha products have earned a reputation for reliability and performance. USX Corporation and Associated Teaching Note. Alphatec Electronics Pcl, Loewen Group); and restructuring in severely distressed industries, including financial services, automotive.
The INFUSE Bone Graft is considered medically necessary for treating skeletally mature persons with acute, open tibial shaft fractures that have been stabilized with intramedullary nail fixation after appropriate wound management, when INFUSE Bone Graft is .
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