Virtual unicompartmental knee arthroplasty model construction method based on point-to-point registration technology

Abstract

The invention relates to a virtual unicompartmental knee arthroplasty model construction method based on point-to-point registration technology, and belongs to the technical field of three-dimensional simulation of computers. The method includes the steps: acquiring postoperative CT (computed tomography) images of a UKA (unicompartmental knee arthroplasty); acquiring preoperative MRI (magnetic resonance imaging) images of the UKA; saving data; importing CT two-dimensional images, and rebuilding three-dimensional models; importing MRI two-dimensional images, and rebuilding three-dimensional models; registering and modifying knee joint models; constructing three-dimensional models of prostheses; assembling postoperative knee joint simulation prostheses of the UKA; optimizing the models; dividing grids; defining attributes of materials of various parts; applying loads and boundary conditions; verifying the models. According to the method, imaging scan is performed based on cases, experimental results have pertinence, constructed models are closer to actual situations, the method particularly replies research of failure cases or successful cases and is simple in operating process and less in related software, corresponding prostheses are scanned according to used types in actual operations, experimental time is shortened, and experimental cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of computer three-dimensional simulation and simulation, and relates to a method for establishing a complete geometric anatomical simulation model of human knee joint replacement surgery, in particular to a virtual knee joint replacement surgery model based on point-to-point registration technology method of construction. Background technique [0002] At present, there have been many studies on three-dimensional digital modeling and biomechanical finite element analysis of knee joint replacement surgery. Optimize the operation during the operation and guide the patient to perform effective rehabilitation exercises after the operation and avoid unhealthy lifestyles that damage joints and prostheses. At the same time, with the help of the finite element analysis of the three-dimensional model of the knee joint, it also makes up for the lack of complex in vitro biomechanical analysis and long clinical follow-u...

AI Technical Summary

Problems solved by technology

[0004] The traditional method has the following disadvantages: (1) The focus of research and follow-up is to take into account and analyze the degeneration, hyperplasia, and defect of the patient's own tissue, as well as poor osteotomy and inappropriate position of the prosthesis during the actual operation. However, choosing the lower limbs of normal people for simulated surgical operations cannot truly restore the real situation, and it is difficult to achieve individualized research, and the experiment lacks pertinence; (2) The research process involves simulated 3D modeling, simulated osteotomy and prosthetic installation, which is very difficult In most cases, it is not done by doctors, but by engineers based on their own experience. Therefore, there may be deviations from the actual situation during the simulated operation and prosthesis installation. Inaccurate osteotomy and poor prosthesis installation position will seriously affect the later stage. The results of finite element analysis; (3) Because the size of the osteotomy surface after the osteotomy operation is not known in advance, the type of prosthesis cannot be judged in advance, so it is necessary to scan and reversely reconstruct all the prostheses, which consumes a lot of time, energy, and engineering effort; (4) There are many engineering software for simulation operation design, which will undoubtedly increase the cost and time consumption

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