Personalized prosthesis for accurate resection pelvic tumor by computer aided design and manufacturing method of personalized prosthesis

Abstract

The invention belongs to the field of orthopedic surgery osteotomyorthoses, and particularly relates to a personalized prosthesis for accurate resection pelvic tumor by computer aided design and a manufacturing method of the personalized prosthesis.The manufacturing method includes the following steps that complete pelvic data is collected, a three-dimensional model of a pelvis is established, ifno hip joint replacement is required, an osteotomy position can be directly determined,the personalized prosthesis is designed, if hip joint replacement is required, when an acetabulum is designed onthe personalized prosthesis, when an opposite acetabulum is normal, a prosthesis acetabulum can be designed according to parameters of the opposite acetabulum; when the opposite acetabulum is abnormal, a prosthesis is designed according to normal parameters; and the prosthesis ismanufactured by combining position and directions of fixing nails and an osteotomy knife. The manufacturing method has the beneficial effects that accurate tumor resection and personalized prosthesis positioning are achieved, an autogenous bone of a patient is retained by the prosthesis to the greatest extent, stability of the prosthesis is increased, rapid growth of the interface between the prosthesis and the bone is facilitated, at the same time, the function of the pelvis is ensured to the greatest extent, operation of orthopedic tumor resection and prosthesis replacement operation is simplified, and accuracy of the operation is improved.

Description

technical field [0001] The invention belongs to the field of osteotomy orthopedic equipment for orthopedic surgery, in particular to a computer-aided design of a personalized prosthesis for precise excision of pelvic tumors and a manufacturing method thereof. Background technique [0002] With the increasing rise of computer-assisted orthopedics, 3D printing-assisted orthopedic precision surgery technology is also gradually increasing. This technology is mainly used in fracture malunion, congenital bone deformity or dysplasia, joint replacement, bone tumor resection, etc. Due to the complexity of the mechanism and anatomical features, the resection of pelvic tumors has always been a difficult point in orthopedic surgery. It is necessary to ensure complete resection of the tumor and restore the patient’s postoperative mobility as much as possible. Therefore, the angle of osteotomy and The direction is very demanding, and the inaccurate range and angle of osteotomy will direct...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of the inability to accurately measure the amount of osteotomy and the uncontrollable spatial angle of the position of the prosthesis in traditional surgical techniques, and the number of X-ray exposures during the operation, the present invention provides a computer-aided design guide plate for precise resection of pelvic tumors and a personalized prosthesis and Its production method, this method is based on the contralateral or normal structural and functional parameters as the standard, if the replacement of the hip joint is not required, the prosthesis at the tumor site can be designed directly according to the mechanical properties of the pelvis, such as tumor invasion of the articular surface or joint weight-bearing area, When it is necessary to design the acetabulum on a personalized prosthesis, if the contralateral acetabulum is normal, the prosthetic acetabulum can be designed according to the inclination angle of the contralateral acetabulum and the height of the acetabulum; The prosthesis can be designed according to the angle and the original height of the prosthesis on the affected side, and the position of the fixation nail and the position and direction of the osteotomy knife can be determined. The precise structure and function can be repaired without fluoroscopy during the operation.

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