Preoperative hip joint deformity bone model manufacturing method based on 3D printing technology

Abstract

The invention relates to a 3D printing-based method for making a preoperative bone model of hip joint deformity, which uses the force line standard of the human body to collect digital imaging data of the hip joint, processes the digital imaging data, and then inputs the digital imaging data into computer-aided design software for bone layering and positioning, carry out 1:1 operation design on the digital three-dimensional model and human skeleton, and use CAD to remove the deformed bone according to the deformity state of the hip joint, so that the formed upper and lower osteotomies can be matched up and down; the generated three segments The imaging data of the osteotomy is input into the Materialize 3D modeling software to simulate the human skeleton and then 3D print out the three-segment osteotomy model. The osteotomy simulation operation in vitro can realize the plasticity of the prosthesis to be implanted in advance, and truly achieve personalized surgery and customized prosthesis design and production.

Description

technical field [0001] The invention belongs to the field of medical technology, and in particular relates to a method for making a bone model of preoperative hip joint deformity based on 3D printing technology. Background technique [0002] Developmental dysplasia of the hip (developmental dysplasia of the hip, DDH) is a common hip deformity. Its incidence rate is as high as 1.3-28.5%. The most commonly used periacetabular osteotomy for young patients is the "PAO periacetabular osteotomy" proposed by Swiss orthopedist Ganz and his colleagues in 1983, also known as Ganz periacetabular osteotomy (Periacetabularosteotomy, PAO) . SteppacherSD et al. used PAO to treat symptomatic DDH patients, and the excellent and good rate reached 61% in 20 years. [0003] The reasons for the difficulties and high complications of PAO surgery are as follows: First, the structure of the pelvis and hip joints in patients with DDH is relatively complex, and the exposure during the operation is...

AI Technical Summary

Problems solved by technology

[0005] Although 3D reconstruction and computer simulation of surgical operations allow physicians to specify a good preoperative plan, but because this technology can only be displayed in 2D, the surgeon forms the plan in his mind, and still cannot provide precise positioning for the operation in actual operation. The accuracy of intraoperative image registration is not high, especially for the complex anatomical structure of the pelvis, which leads to surgical errors and low accuracy due to the difficulty in determining the reference bone