3D printing tibia intramedullary nail total ankle joint prosthesis

Abstract

The invention discloses a 3D printing tibia intramedullary nail total ankle joint prosthesis. The 3D printing tibia intramedullary nail total ankle joint prosthesis is characterized by comprising a tibia fixing rod and a tibia far-end total ankle joint prosthesis; the tibia fixing rod comprises a tibia fixing rod body; the lower part of the tibia fixing rod body is provided with a tibia far-end connecting body; the outer surface of the tail end of the tibia far-end connecting body is conical, and an inner threaded hole is formed in the tail end of the tibia far-end connecting body in the axial direction; the tibia far-end total ankle joint prosthesis comprises a tibia far-end prosthesis, a polyethylene liner and a calcaneus and talus prosthesis; and a taper connecting hole is formed in the upper end of the tibia far-end prosthesis, the tail end of the tibia far-end prosthesis is inserted into the taper connecting hole in a conical mode, the taper connecting hole is provided with a screw hole connected with an arch-shaped opening, and the tibia far-end prosthesis and the tibia fixing rod are connected by screwing a screw into the screw hole and the inner threaded hole. The 3D printing tibia intramedullary nail total ankle joint prosthesis has the advantages that the prosthesis is suitable for prosthesis replacement of a patient with the distal tibia resection, the wing plates and the grooves are arranged in the axial direction, so that implantation of the prosthesis is more stable, and medium-and-long-term stability is good.

Description

technical field [0001] The invention belongs to the technical field of orthopedic medical devices, in particular to a 3D printed tibial intramedullary nail full ankle joint prosthesis. Background technique [0002] The tibia, as an important load-bearing bone in the human body, is the main component of the lower limbs. As important components of the ankle-hindfoot complex, the tibiotalar joint and subtalar joint are responsible for maintaining the weight-bearing walking of the lower limbs and maintaining normal ankle mobility. However, ankle or hindfoot trauma and malignant bone tumors and other diseases may cause secondary tibiotalar joint and subtalar joint lesions, causing severe pain and walking dysfunction. For patients who cannot achieve satisfactory results with conservative treatment, surgery Treatment can provide better pain relief and restore function. If the lesion is completely resected, distal tibial and ankle replacements are required. Chinese patent applica...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the prior art, in a certain case, in addition to resecting the distal end of the tibia and the ankle joint, the normal function of the tibia can only be preserved to the proximal end of the tibia. The plan requires the resection of the tibia to retain only the proximal part of the tibia, which cannot meet the clinical application requirements of this case. After the proximal tibia and tibia are preserved, a tibial fixation rod connecting the proximal tibia and the distal tibia prosthesis needs to be implanted, while the ankle The joint needs to use the distal tibial ankle joint prosthesis. Since this case is relatively rare, there is no relevant literature disclosing the technical solution for this case. The purpose of the invention is to provide a 3D printed tibial intramedullary nail full ankle joint The prosthesis is suitable for prosthesis replacement in patients with distal tibial resection. The tibial fixation rod is implanted in the tibial medullary cavity, and is connected and fixed with the proximal end of the tibia and the tibia through an intramedullary nail. , so that the implantation of the tibial fixation rod in the tibia is more stable, and the medium and long-term stability is good; there is no need to replace the whole tibia, and the intact tibia is preserved. The length of the tibial fixation rod body is designed according to the size of each patient; the distal end of the tibia The total ankle joint prosthesis uses polyethylene liners to buffer the downward pressure on the ankle joint when the human body is upright, so as to restore the overall movement balance of the joint and meet its biomechanical requirements

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