Knee joint cruciate ligament reconstruction fixer

Abstract

The invention discloses a knee joint cruciate ligament reconstruction fixer, which comprises a nail sheath for being mounted into a tibial tunnel, wherein the nail sheath is provided with at least four elastic sheath walls, and the knee joint cruciate ligament reconstruction fixer further comprises a driven nail for being inserted into the nail sheath to radially expand the sheath walls; the sheath walls include at least one pair of oppositely arranged first sheath walls and at least one pair of oppositely arranged second sheath walls, each first sheath wall is provided with pointed lugs for being fixed in the tibial tunnel, each second sheath wall is provided with tendon-admitting holes in which a tendon can be embedded after being squeezed, and the first sheath walls and the second sheath walls are alternately arranged at intervals. During use, squeezed by the driven nail, the pointed lugs can be pressed into the wall of the tibial tunnel, so that the nail sheath is securely fixed; and under the action of own elasticity, a transplanted tendon can be automatically embedded into the tendon-admitting holes and a gap between every two adjacent sheath walls. The fixer can prevent a cutting effect on the transplanted tendon, and moreover, the fixer has a good fixing effect, and ensures the healing of the transplanted tendon in the tibial tunnel.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a cruciate ligament reconstruction fixation device of the knee joint. Background technique [0002] As an important structure to maintain the stability of the knee joint, the cruciate ligament will seriously affect the daily life of patients once it is broken. [0003] The current method of treating cruciate ligament rupture is usually to perform cruciate ligament reconstruction by implanting autologous tendon into the tibial tunnel. In the prior art, after the autogenous tendon is implanted into the tibial tunnel, interface screws are usually used for extrusion and fixation. However, although the method of interface screw fixation is simple, the thread of the screw will have a cutting effect on the tendon, reducing the tensile strength of the tendon. reduce. In addition, due to the space-occupying effect of the grafted tendon in the tunnel, it is difficult for the ...

AI Technical Summary

Problems solved by technology

In the prior art, after the autogenous tendon is implanted into the tibial tunnel, interface screws are usually used for extrusion and fixation. However, although the method of interface screw fixation is simple, the thread of the screw will have a cutting effect on the tendon, reducing the tensile strength of the tendon. reduce

In addition, due to the space-occupying effect of the grafted tendon in the tunnel, it is difficult for the thread of the interface screw to hold the wall of the tibial tunnel. Therefore, the interface screw cannot tightly squeeze the wall of the tibial tunnel, and the fixation effect is not good.

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