Transplanting ligament with indirect dead point and implanting method

By introducing a synergistic structure of indirect and direct insertion points into the transplanted ligament, the problems of abnormal joint movement and fixation failure caused by the failure to simulate indirect insertion points in existing technologies are solved, resulting in better joint movement recovery and stability.

CN121101804AActive Publication Date: 2025-12-12SHANGHAI JIAOTONG UNIV
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Patent Information

Application Number
CN202511506792.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-21
Publication Date
2025-12-12
Estimated Expiration
2045-10-21

AI Technical Summary

Technical Problem

Current ligament transplant designs only reconstruct the direct insertion point, without considering the structure and function of the indirect insertion point, leading to problems such as joint kinematic abnormalities, osteoarthritis, enlarged bone tunnels, and fixation failure.

Method used

A graft ligament with indirect insertion points is designed, including direct and indirect insertion points on the femoral and tibial sides. It is directly connected to the bone surface through various fixation methods to simulate the morphology and function of the native ACL-bone interface, thereby increasing the contact area and connection stability.

Benefits of technology

It restores the normal kinematics of the joint, reduces the risk of osteoarthritis, decreases the relative movement between the transplanted ligament and bone and fixation failure, and improves fixation stability and postoperative recovery.

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Abstract

The invention relates to the technical field of transplanted ligaments, and provides a transplanted ligament with indirect dead points, which comprises a thighbone side direct dead point, a thighbone side indirect dead point, a free fiber segment, a tibia side direct dead point and a tibia side indirect dead point, the free fiber section is located in an articular cavity and does not participate in ligament fixation, and the thighbone side direct dead center and the tibia side direct dead center are connected with the free fiber section; the thighbone side direct dead center and the tibia side direct dead center are fixed in a bone tunnel, the thighbone side indirect dead center and the tibia side indirect dead center are fixed on a bone surface, and the thighbone side indirect dead center and the tibia side indirect dead center exist at the same time or only one exists; the thighbone side indirect dead point is connected with any one of the thighbone side direct dead point and the free fiber section; the tibia side indirect dead center is connected with any one of the tibia side direct dead center and the free fiber segment. And precise bionic adaptation is achieved, and the original movement function of the joint is recovered.
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