Self-locking fixed part for surgical implant

Abstract

The invention relates to a self-locking fixed part for a surgical implant. The self-locking fixed part comprises a steel plate and a self-locking screw, wherein the self-locking screw consists of a screw rod and a screw cap, a ring-shaped groove with the end surface being similar to the V shape is arranged on the screw cap longitudinally, the screw cap is divided into an outer ring and an inner ring by the ring-shaped groove, more than two openings are arranged on the outer ring of the screw cap longitudinally, and the part with the maximum outer diameter of the screw cap is lower than the upper end surface of the screw cap; a screw hole matched with the shape of the screw cap is arranged on the steel plate, the inner diameter of an inlet of the screw hole is less than the maximum outer diameter of the of the screw cap, the maximum inner diameter of the screw hole is larger than the inner diameter of the inlet of the screw hole and less than the maximum outer diameter of the screw cap, and the inlet of the screw hole and an arc of the part with the maximum inner diameter are connected to form a laminated arc; and the self-locking screw penetrates through the screw hole arranged on the steel plate and is implanted into the steel plate for compressing and fixing the steel plate, and therefore, the part with the maximum outer diameter of the outer ring of the screw cap pushes against the laminated arc of the screw hole in a clamping way, so as to realize self locking. The self-locking fixed part has the advantages that the structure is simple, the cost is low, the processing and the production are easy, the implantation is convenient, the operation is fast, the incisura is small, and the surgery time is saved.

Description

Technical field [0001] The invention relates to a fixing part of a surgical implant, in particular to a self-locking fixing part of a surgical implant. Background technique [0002] At present, in surgical operations, when treating fractures or fixing surgical implants in bones, lock pads and lock nails are usually used to fix the screws on the steel plate to prevent the screws from exiting to achieve fixation. Another structure is to install a spring ring or a threaded expansion ring in the steel plate screw hole to prevent the screw from exiting. [0003] Such as figure 1 The fixed part of the surgical implant shown is composed of a steel plate a, a screw b, a lock pad c and a lock nail d. After the plate a is fixed during the operation, screw b along the plate screw hole to fix the plate a. In order to prevent the screw b from exiting, the screw b is usually fixed by pressing the screw b by the lock nail d and the lock pad c. Therefore, the screw b is actually used to fix the...

AI Technical Summary

Problems solved by technology

Therefore, there are many fixing parts, which is not only complicated to process but also cumbersome to operate.

And every time one more part is installed in the operation, it will make the operation one more step, the operation time will be prolonged, and the risk will be increased.

At the same time by figure 1 It can also be seen that in order to fix the screw b, the lock washer c and the locking nail d need to press the screw b, and the locking nail d is easily higher than the steel plate a, resulting in a relatively high notch

Images