Personalized artificial sacrum prosthesis based on additive manufacturing

Abstract

The invention discloses a personalized artificial sacrum prosthesis based on additive manufacturing, and relates to the field of medical instruments. The personalized artificial sacrum prosthesis based on additive manufacturing comprises a T-shaped main body and locking pieces, wherein the T-shaped main body comprises a longitudinally arranged bearing area and a connecting area transversely arranged below the bearing area. The personalized artificial sacrum prosthesis comprises the main body and the locking pieces, bears the lumbar vertebra and the pelvis and has high strength, high matching degree with a reconstruction area and natural bearing stability; screw fixing positions are accurate and sufficient, the bone mass of screw placing parts is rich, and the firmness is higher; A lightweight design concept is adopted, and the weight of an implant is reduced as much as possible on the premise of ensuring the strength of vertebral bodies; due to the arc design, a nerve root walking channel is reserved, and sacral nerve clamping and pressing are avoided; and the bone contact surface is rough and porous, instant stability and bone ingrowth are facilitated to form biological internal fixation, and personalized accurate reconstruction of a sacrum total incision bone defect area can be realized through detailed preoperative planning.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a personalized artificial sacral prosthesis based on additive manufacturing. Background technique [0002] Reconstruction after tumor resection of the sacrum is a world-class problem. The sacrum connects the lumbar spine and the ilium on both sides, and plays the role of stress transmission and motion connection. The bone defect structure after sacral resection is very complex, and the lumbar spine and pelvis cannot be directly connected. There are many reconstruction methods at present, and there is a high possibility of internal fixation loosening in the short term after surgery. At present, there is no consensus on a technical solution in the world, but iliac screw connection and fixation is a common practice. At the same time, various fixation methods such as iliac rods, bone grafts, and penetrating nails are also assisted, but none of them can achieve reliable fixation. , the...

AI Technical Summary

Problems solved by technology

The structure of the bone defect after sacral resection is very complex, and the lumbar spine and pelvis cannot be directly connected. There are currently many reconstruction methods, and there is a high possibility of internal fixation loosening in the short term after surgery.

At present, there is no consensus on a technical solution in the world, but iliac screw connection and fixation is a common practice. At the same time, various fixation methods such as iliac rods, bone grafts, and penetrating nails are also assisted, but none of them can achieve reliable fixation. , the possibility of internal fixation displacement after long-term broken nails is very high

At the same time, the complex fixation method is not only time-consuming and laborious, but also increases the difficulty of the doctor's operation, and also increases the trauma of the patient, resulting in postoperative discomfort for the patient.

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