Posterior cruciate ligament lower dead center positioner

Abstract

The invention discloses a posterior cruciate ligament lower dead center positioner. The positioner comprises a positioner handheld part, a tibia fixing part, a guide sleeve, a depth limiting sleeve and a depth limiting drill bit, the whole handheld part of the positioner is in an arc-shaped handle shape. A hollow wire channel is formed in the upper part; the outlet of the hollow wire channel is positioned at the vertex of the handheld part of the positioner; three fixing holes with the inner diameter of 2.00 mm are formed in the rear end of the positioner fixing part and used for fixing the positioner to the tibia cortex, the positioner tibia fixing part is an arc with the diameter of 11 cm, and the upper end of the positioner tibia fixing part slides into the sliding rail of the positioner handheld part and is locked and fixed by screws on the sliding rail at the same time. The posterior cruciate ligament graft can be quickly and safely built on the premise that an inner posterior approach is not built, the posterior cruciate ligament graft can be easily pulled into the femur and the tibia bone tunnel, the operation time can be shortened, the operation safety and repeatability canbe improved, the operation difficulty can be reduced, and the learning curve of young doctors can be shortened.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a positioner for the lower dead point of the posterior cruciate ligament. Background technique [0002] Posterior cruciate ligament injuries account for 3% to 20% of knee ligament injuries, and are often caused by impacts on the front of the knee or falls with the knee bent. Individual injuries are rare, and other ligament injuries are easily complicated. The posterior cruciate ligament provides 95% of the resistance to the posterior displacement of the tibia, limits varus and external rotation, and relieves the pressure between the patellofemoral joint and the medial tibiofemoral joint. Untreated PCL ruptures can lead to patellofemoral arthritis and medial knee osteoarthritis. In order to restore the structure and function of the knee joint, it is necessary to actively use arthroscopic surgery to reconstruct the posterior cruciate ligament when the posterior cruciate ligam...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a positioner for the bottom dead point of the posterior cruciate ligament, which solves the instability problem of the current bottom dead point positioner of the posterior cruciate ligament in the process of driving the guide pin, and does not have restrictions when drilling the tibial bone tunnel. The problem of depth and the difficulty of crossing the traction line

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