Method for preparing acetabulum supplementary material

Abstract

The invention discloses a method for preparing an acetabulum supplementary material. The method comprises the steps that thin layer CT image data of a hip joint of a patient is collected, and an acetabulum three-dimensional model and a femoral head three-dimensional model are created; an acetabulum supplementary material three-dimensional model is created; the acetabulum three-dimensional model, the femoral head three-dimensional model and the acetabulum supplementary material three-dimensional model are subjected to finite element analysis, so that weight-bearing position stress distributionanalysis results under two simulation states are obtained; the two weight-bearing position stress distribution analysis results are compared; the acetabulum supplementary material three-dimensional model is subjected to porous treatment; repairing and optimizing treatment is conducted; the acetabulum supplementary material three-dimensional model, the acetabulum three-dimensional model and the femoral head three-dimensional model which are obtained after repairing and optimizing treatment are prepared, and the matching rate among entities are verified on the basis of an acetabulum entity, thefemoral head entity and the acetabulum supplementary material entity. Accordingly, insufficient covering of the acetabulum to the femoral head can be effectively supplemented, and the stress concentration problem is solved.

Description

technical field [0001] The invention relates to the technical field of surgical medical instruments, in particular to a method for preparing acetabular supplementary materials based on computer simulation and additive manufacturing technology. Background technique [0002] Acetabular dysplasia is a common orthopedic disease, which can cause hip joint pain, limited mobility, and severe cases of lameness, seriously affecting the life and work of patients. The pathological mechanism is that the acetabulum covers a small area of ​​the femoral head due to the abnormal development of the acetabulum, and the stress is concentrated during load-bearing, resulting in articular cartilage damage and degeneration, and eventually osteoarthritis. [0003] At present, the main treatment methods for acetabular dysplasia are osteotomy and total hip replacement. And the joint space still exists, it can be treated by preserving the hip joint to correct the deformity of the hip joint, improve t...

AI Technical Summary

Problems solved by technology

The osteotomy is to change the position of the acetabulum and increase the coverage area of ​​the femoral head to disperse the stress, but this technique is difficult to operate, has a large trauma to the patient, and has high risks, so this technique is difficult to popularize; Total hip arthroplasty is suitable for people over 60 years old. If younger patients undergo joint arthroplasty, they will face the problem of two or more revisions in the long-term. There is a high risk of revision surgery and uncertain clinical efficacy The problem

Based on this, there is currently no simple and effective treatment for younger patients with acetabular dysplasia

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