3D printing personalized talus surface replacement prosthesis

Abstract

The invention discloses a 3D printing personalized talus surface replacement prosthesis, comprising a prosthesis made by 3D printing technology. The prosthesis includes a smooth joint surface for fitting to the subtalar articular surface and a part to cut away from the talus. The prosthesis further comprises a body between the smooth connecting surface and the rough contact surface, and the roughcontact surface is provided with a plurality of micropores which are fixedly connected to the talus by allowing the newly growing bone of the talus to protrude. The prosthesis is provided with a connecting piece for connecting it to the talus. The 3D printing personalized talus surface replacement prosthesis provided by the invention has talus surface replacement retaining all ligaments around thetalus, which not only maintains the stability of the ankle joint and the posterior foot, but also preserves the normal body sensation of the patient, and the clinical prognosis is predictable and good.

Description

technical field [0001] The invention relates to the field of ankle joint treatment, in particular to a 3D printed personalized talus surface replacement prosthesis. Background technique [0002] The ankle joint is the most vulnerable weight-bearing joint in the human body. Ankle sprain alone accounts for 20% of sports injuries, and is a common reason for emergency department visits in my country. Unlike the knee joint, post-traumatic arthritis is the most common cause of end-stage ankle arthritis. Due to the poor blood supply of the talus itself, necrosis and articular surface collapse are prone to occur. Therefore, the injury of the articular surface of the talus of the ankle joint is often more common than that of the articular surface of the tibia. Up to 50% of ankle sprains will cause talus osteochondral damage. [0003] Osteochondral defects of the talus alter the biomechanical state of ankle weight bearing, eventually leading to severe ankle arthritis, making it diffi...

AI Technical Summary

Problems solved by technology

However, the prosthesis has a handle that extends into the neck of the talus for fixation. The stress on the shank of the prosthesis is relatively concentrated, which is likely to cause the prosthesis to loosen, move forward, sink, and fail, and the rate of talar head necrosis is high.

[0007] In talar replacement surgery, another way is total talar prosthesis replacement, however, total talar replacement cannot repair the anterior talofibular ligament, triangular ligament, tibiotalar ligament, intertalareal ligament, cervical ligament, etc. to maintain the ankle joint and subtalar An important ligament for joint stability, the long-term prognosis is worrying

[0008] It can be seen from the above that for such patients with relatively intact articular surface of the distal tibia and only damaged articular surface of the dome of the talus, none of the above methods can achieve ideal results.

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