3D printing expansion press-fit type acetabular revision prosthesis

Abstract

Along with the increase of the number of hip joint rebuilding cases caused by aging in China society, the number of cases with acetabulum defects is also increased year by year, and hip joint prostheses produced in batches at present are limited in adaptability to patients with acetabulum defects. The 3D-printed expansion press-fit acetabulum revision prosthesis is designed, adjustment can be conveniently conducted according to preoperative imaging data of a patient, the problems that the acetabulum rotation center shifts and is difficult to fix, stress is concentrated and the like are solved, the prosthesis is based on the principles of mechanical mechanics and biomechanics, the cushion block structure is designed in a split mode, and the structure is simple and convenient. The fixing device is convenient to modify at any time according to conditions, convenient to mount and capable of playing a role in positioning during surgical operation, stress of a press-fit structure is dispersed, and the fixing device is fixed in a multi-screw-hole penetrating mode and is higher in binding force with the bone surface. The expansion press-fit type acetabulum revision prosthesis complements the acetabulum defect part, plays a very important role in post-rehabilitation movement of a patient, and has wide applicability in acetabulum defect and revision after artificial hip joint replacement.

Description

technical field [0001] The present invention mainly relates to the technical field of medical equipment, in particular, the present invention relates to the technical field of 3D printing hip joint prosthesis. Background technique [0002] The aging of the social population has led to an increasing number of patients with hip degenerative diseases. At the same time, the incidence of falls and osteoporosis also increases with the age of the population. The number of patients with acetabular defects is also increasing. With the continuous improvement of people's quality of life requirements and the continuous improvement of surgical technology, the application of artificial hip replacement and artificial hip revision is increasing. Kurtz et al. mentioned in a paper published in 2007 that the number of patients with primary total hip replacement in the United States is expected to increase by 174% in 2030, reaching 572,000 cases per year. Toogood and Vail reported in 2015 tha...

AI Technical Summary

Problems solved by technology

[0003] The present invention is mainly aimed at patients undergoing revision after artificial hip replacement and acetabular defect. The acetabular defect makes total hip replacement more demanding on the prosthesis. Traditional prosthesis assembly will shift the center of acetabular rotation. , and there are problems such as weak fixation and stress concentration

The present invention provides a 3D printed expansion and press-fit acetabular revision prosthesis, which solves the problems of acetabular rotation center displacement, difficulty in fixation and stress concentration, etc.

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