Rotary pressurizing fixation steel plate for posterior cruciate ligament avulsion fracture

Abstract

The utility model relates to a rotationally pressurized and fixed steel plate for posterior cruciate ligament avulsion fracture, which belongs to the technical field of orthopedic medical devices and is used for tensioning a pulling wire. The technical solution is: the steel plate is circular, and there are four circular holes on the surface of the circular steel plate, the four circular holes are uniformly distributed on the steel plate surface, and the distance between the center of the four circular holes and the center of the circular steel plate is equal, wherein The center line of the two round holes is perpendicular to the center line of the other two round holes. There is a circle of pawls along the edge of the steel plate on one side of the steel plate. The braking direction of the multiple pawls is to surround the plate surface of the steel plate. same direction of the circle. The invention has the advantages of simple structure, convenient use and good self-locking effect, can effectively tighten the pulling wire, avoid the tension relaxation of the posterior cruciate ligament, and prevent the failure of the fixation operation due to the decrease of the tension of the posterior cruciate ligament.

Description

technical field [0001] The invention relates to a rotating and pressurized fixed steel plate for arthroscopic treatment of the outer opening of a tibial tunnel for posterior cruciate ligament avulsion fracture, which belongs to the technical field of orthopedic medical devices. Background technique [0002] Avulsion fracture of the posterior cruciate ligament is a violent injury in the field of sports medicine, which is commonly seen in car accident injuries or competitive sports injuries of high-level athletes. The traditional treatment method is to make an incision at the back of the knee joint to fix the fracture fragments. However, due to the rich distribution of blood vessels and nerves in the back of the knee joint, it is easy to cause damage, and the clinical treatment is very difficult. [0003] With the promotion and popularization of precision medicine and minimally invasive concepts, for the avulsion fracture of the posterior tibial condyle of the posterior crucia...

AI Technical Summary

Problems solved by technology

The most critical point in the operation is that the puller wire that tightens the avulsion fragment at the outer opening of the tibia must be tightened, and there must be no looseness. Millimeter-level movement or relaxation will cause a great reduction or loss of tension, and then cause fixation. failure of surgery

However, due to the narrowness of the knee joint cavity and the tension of the posterior cruciate ligament when the tension is restored, it is extremely difficult to achieve complete tension when the puller wire is finally fixed.

[0004] At present, the methods used by clinicians are mostly hand-tight knotting or button plate fixation, but no matter how careful and tight the manual knotting method or the button plate fixation process is, knotting and fixing actions are required. Inversion of the midline will inevitably lead to millimeter-scale laxity, which is the main cause of postoperative tension loss and surgical failure

Therefore, how to tighten the puller wire without slack is a difficult problem that plagues doctors in clinical practice. So far, no medical device and method that can better solve the problem of loose knots have been found, which needs to be solved urgently.

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