Curved surface locating minimally invasive acetabular front column screw aiming device and preparation method thereof

Abstract

The invention provides a curved surface locating minimally invasive acetabular front column screw aiming device which includes a body of a triangular truss structure. The body includes two main locating feet, an auxiliary locating foot, one main support wall and two auxiliary support walls. The preparation method comprises the following steps that S01, goal hip bone medical image data are obtained; S02, point set of the center point of front column region is obtained; S03, the channel direction of a front column screw is determined; S04, the maximum diameter of an inner cylinder in the channeldirection of the front column screw is determined; S05, the external diameter of a bone screw and the inner diameter of a guide drill jig channel are determined; S06, a drilling channel of a front column bottom hole is built; S07, the three-dimensional model of the aiming device is established; and S08, the aiming device is prepared by 3D printing. The internal fixation of acetabular front columnlag screw can be carried out accurately and rapidly by using the aiming device, not only is the operation efficiency improved, but also the accuracy and safety of the operation are guaranteed.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a curved-surface positioning type minimally invasive acetabular anterior column screw aligner and a preparation method thereof. Background technique [0002] Internal fixation of acetabular fractures is also called open reduction and internal fixation of acetabular fractures. It is indicated for patients with severe acetabular fractures. The acetabular fractures are reduced and internally fixed by surgical methods. Internal fixation of acetabular fractures can restore the anatomical reduction and reliable fixation of the load-bearing part of the acetabulum, and improve or restore the biological function of the acetabulum. Internal fixation is the most reliable fixation method. [0003] The method of acetabular anterior column lag screw internal fixation was proposed by Elliott et al. in 1956. In 1980, Senegas et al. proposed the internal fixation method of the acetabula...

AI Technical Summary

Problems solved by technology

[0013] 1. In order to make the positioning of the jig template accurate, all the muscles and other tissues in the acetabulum and ilium region must be stripped to find the landmark points of the iliac tubercle, the corner point on the posterior gluteal line, the entry point of the ilium and the iliac crest. Auxiliary positioning points on the wing surface, which lead to large wounds and blood loss, increasing the difficulty and risk of surgery;

[0014] 2. The position stability of the positioning tip is poor, and the vibration during drilling during the operation can easily cause the drilling template to slip, thus affecting the accuracy of nail placement;

[0015] 3. In order to plan the anterior column screw placement channel, it is necessary to fit the centerline of the anterior column in the 3D reconstruction model. However, due to the particularity of the anatomical structure of the hip bone, the existence of the posterior column in the complete hip bone model will affect the centerline of the anterior column. The precise generation of

[0016] 4. When planning the nailing channel, in addition to mastering the medical imaging software and reverse engineering modeling software commonly used in the medical field, it is also necessary to be proficient in using scientific computing software, which requires high requirements for planners, and the operation is cumbersome and the cycle is long

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