Special internal fixing device for proximal tibia joint osteotomy

Abstract

The invention relates to a special internal fixation device for proximal tibia joint osteotomy, which comprises a supporting steel plate and a plurality of locking screws, the supporting steel plate is composed of a proximal head, a middle connecting part and a distal tail which are sequentially connected and integrally formed, and locking screw holes are respectively formed in the proximal head and the distal tail. The middle connecting part is further provided with locking / pressurizing combined holes, the locking screws are arranged in the locking screw holes and the locking / pressurizing combined holes respectively in a matched mode, the locking screw holes in the near-end head comprise a first screw hole, a second screw hole and a third screw hole which are horizontally arranged and additional screw holes located in the corner positions of the lower portion of the near-end head, and the additional screw holes are matched with the first screw hole, the second screw hole and the third screw hole. The mounting angle of the additional screw hole meets the condition that the direction of the locking screw placed in the additional screw hole is perpendicular to the osteotomy surface of the tibia intercondylar bulge. A more stable knee joint biomechanical environment can be provided for treating introversion knee osteoarthritis by combining the proximal tibia with osteotomy, and compared with existing steel plate internal fixation, the knee joint internal fixation device is firmer and more reliable.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a special internal fixation device for combined osteotomy of the proximal end of the tibia. Background technique [0002] Knee osteoarthritis is a common chronic joint disease in knee surgery, with high prevalence, wide range of lesions, and severe late dysfunction. Knee varus is the most common deformity in knee osteoarthritis, also known as "O-shaped leg". It is formed by the joint action of two pathological factors, extra-articular and intra-articular. Proximal tibial open osteotomy (OWHTO) is a common method for the treatment of varus knee osteoarthritis. It is mainly used to correct extra-articular deformities and has a strong ability to correct force lines, but intra-articular deformities still remain after surgery. Tibial intercondylar osteotomy (TCVO) is mainly used to correct intra-articular deformities, but its ability to correct the force line is weak, and its ...

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Problems solved by technology

[0003] At present, the Tomofix internal fixation system and additional screws are used for fixation in CPTO surgery, but it is difficult to determine the exact position and direction of the additional screw implantation, and there are problems of insufficient structural stability and inconvenient operation, so a special application is urgently needed Internal fixation orthopedic plate system for CPTO surgery

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