Production method of acetabulum navigation template

Abstract

The invention discloses a production method of an acetabulum navigation template. The production method comprises building a three-dimensional model of a pelvis according to computed tomography scanning data of the pelvis; extracting surface point clouds of an acetabulum in the three-dimensional model; fitting the surface point clouds to an optimal sphere and enabling a sphere centre coordinate to be a rotation center coordinate of the acetabulum; utilizing a triangle function relation and the rotation center coordinate of the acetabulum to calculate to obtain a direction vector of a navigation tube in the acetabulum navigation template; and utilizing a rapid prototyping technology to produce an entity of the acetabulum navigation template. The production method of the acetabulum navigation template has the advantages of enabling the acetabulum navigation template entity which is highly matched with acetabulum fossa ovalis of patients to be produced; enabling physicians to perform planning and simulation according to actual conditions of skeletons of the patients before operation; enabling a convenient contact to be established between a preoperative plan and intraoperative operation; and providing a new method and an effective auxiliary means for accurate implantation of acetabular cup prosthesis in artificial hip replacement.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a method for making an acetabular navigation template. Background technique [0002] Osteoarthritis (OA) is a common bone and joint disease. Since the 1960s, total hip replacement has gradually become the standard procedure for treating hip disease. [0003] Studies have shown that the implantation angle of the hip prosthesis in total hip arthroplasty must be within the safe position range to avoid dislocation, increase the stability of the acetabular prosthesis, and reduce osteolysis and wear of polyethylene lining materials. The hip prosthesis is the main part of body weight transmission after joint replacement. The ideal position of the acetabulum should fit the acetabular wall to the greatest extent and have an appropriate orientation, so as to restore the biomechanical environment of the acetabulum as much as possible. Therefore, the key to total hip arthroplasty is to pla...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides a method for making an acetabular navigation template, which is used to make an auxiliary model so that the operator can carry out preoperative planning and simulation according to the actual situation of the patient's bone, and solve the false positives caused by the variability of the patient's bone. The problem of difficult implantation

Images