Posterior fixing steel plate for fracture of acetabular anterior and posterior columns

Abstract

The invention relates to a posterior fixing steel plate for fracture of acetabular anterior and posterior columns. The posterior fixing steel plate comprises a plate body covering the back wall of the acetabular posterior column; the plate body extends downwards to the root of an ischial spine from the upper part close to the top end of a greater sciatic notch along the inner side edge of the acetabular posterior column and then is bent and extends to the lower part of the top end of an ischial tuberosity; an anterior column threaded hole for being connected with a guide sleeve is formed in the end, at the top end of the greater sciatic notch, of the plate body, and the axis of the anterior column threaded hole points to the acetabular anterior column through sclerotin between an acetabular fossa and a square area; a posterior column threaded hole used for being connected with the guide sleeve is formed in the other end of the ischial tuberosity and the axis of the posterior column threaded hole points to the tail end of the ischial tuberosity through sclerotin in the ischial tuberosity; a plurality of fixing screw holes arranged along the plate body are formed between the anterior column threaded hole and the posterior column threaded hole; a limiting hook hooked to the upper part of the greater sciatic notch is arranged on the side edge, which is close to the greater sciatic notch, of the end and corresponding to the anterior column threaded hole, of the plate body.

Description

technical field [0001] The invention relates to a surgical instrument, in particular to a fixed steel plate for the acetabular and surrounding structures, which is suitable for fixing fractures of the anterior and posterior columns of the acetabulum in posterior operations. Background technique [0002] The acetabulum and its surrounding structures can be divided into an anterior column and a posterior column. The anterior column runs obliquely from the top of the iliac crest to the pubic symphysis through the pubic ramus, and is composed of part of the ilium and the pubic bone. The posterior column is formed by the greater sciatic notch via the From the center of the acetabulum to the ischial tuberosity, including the vertical part of the ischium and part of the ilium connected to the ischium; the anterior and posterior columns are in an inverted "Y" shape, hugging the acetabulum like a cradle, and meet on the medial side in the square area, preventing hip The joint is disp...

AI Technical Summary

Problems solved by technology

[0004] Although the above combined plate can fix the anterior and posterior meridians of the acetabulum at the same time, it also has the following disadvantages: since the combined plate is fixed on the proximal arcuate surface of the iliac fossa, both the lag screw and the fixation screw must be inserted from the front of the iliac fossa. , so the joint plate can only be placed through the front surgical approach

The anatomical position of the acetabulum is relatively deep, and the adjacent anatomical relationship is complicated. The anterior surgical channel needs to pass through the pelvic cavity. Due to the obstruction of the internal organs in the pelvic cavity, the operation is difficult, the incision is long, the exposure is wide, the amount of bleeding is large, and the operation is easy to be injured. And the organs in the pelvic cavity, there are many postoperative complications, such as iatrogenic sciatic nerve injury, heterotopic ossification, femoral head necrosis, etc.

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