Method for preparing individually-customized pelvic tumor prosthesis

Abstract

The invention relates to a method for preparing individually-customized pelvic tumor prosthesis. The method comprises the following steps of: reconstructing three-dimensional models of pelvises and tumors according to two-dimensional images of captive tests (CT), magnatic resonance imaging (MRI) and the like of patients before operations, demarcating a tumor excision boundary according to a tumor therapeutic principle, and determining a plane and an angle of pelvic osteotomy; and reconstructing the three-dimensional models of amputated pelvic defect parts by comparing with normal pelvises, designing and producing individually-customized prosthesis, and performing surface modification on a contacting section of a prosthesis material and bones to fulfill the aim of combining the prosthesis material and the bones stably. The pelvic tumor prosthesis designed by the method can be customized individually aiming at the tumor excision range of different patients to retain bone mass as far as possible while the tumors are excised completely, and can be matched with the original pelvic excision parts accurately to realize accurate pelvic reconstruction operations; bone integration is formed between the prosthesis and the bones to ensure the long-term stability of the prosthesis; and hip joints of the prosthesis are designed by super-radium acetabuli, so the prosthesis is stable and has a motion function.

Description

technical field [0001] The invention belongs to the field of pelvic tumor resection and reconstruction, and in particular relates to a preparation method of an individualized customized pelvic tumor prosthesis. Background technique [0002] The pelvis is a predilection site for benign and malignant tumors, especially zone II lesions (tumors around the acetabulum) are the most common. Due to the complex anatomy of the pelvis, tumor resection and reconstruction in this area are very difficult. The method of pelvic tumor resection depends on the growth site and extent of the tumor. The pelvis is located at the junction of the trunk and lower limbs, and is important for supporting the trunk and maintaining stability. Therefore, after pelvic resection, reconstruction is necessary to preserve the functions of the limbs. [0003] Reconstruction methods after pelvic tumor resection include: allograft bone reconstruction, Saddle prosthesis reconstruction, adjustable hemipelvic pros...

AI Technical Summary

Problems solved by technology

However, because the prosthesis did not carry out the stress analysis of the osteotomy surface, and the resection and prosthesis installation could not be accurately matched, the clinical results were not satisfactory, with high complications and poor functional results.

In addition, the production cost of the prosthesis is high, the cycle is long, and the unpredictability of tumor resection during operation sometimes limits the use of this prosthesis

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