A trans-articular locking plate for a lisfranc injury

Abstract

The invention discloses a Lisfranc injury cross-joint locking bone plate, which comprises a cross-joint bone plate and a stabilizing mechanism. The cross-joint bone plate is provided with a plurality of locking holes, and the positions of the corresponding locking holes on the cross-articular bone plate are all opened. The limiting ring groove, the stabilizing mechanism used for the stable and accurate nailing of the screw is inserted into the corresponding limiting ring groove. The present invention opens a limiting ring groove on the outside of each locking hole, and through The stabilizing mechanism with well-adjusted insertion angle makes the subsequent nailing angle of the screw more accurate, and avoids problems such as shaking when the screw is inserted because the inner diameter of the locking hole is larger than the diameter of the screw trunk, so as to achieve precise fixation.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a Lisfranc lesion cross-joint locking bone plate. Background technique [0002] Lisfranc injury refers to the fracture and dislocation between the metatarsal bone and the appendage of the foot. It is a common injury in the foot. Improper treatment can lead to the destruction of the biomechanical stability of the foot, resulting in traumatic arthritis, metatarsalgia and other complications. Clinically, Lisfranc injuries are more common in the first and second metatarsal joints. There are many methods for treating Lisfranc injuries, but there is still a lack of a method that comprehensively considers multiple bony structures and ligamentous structure injuries while stabilizing the first and second metatarsal ranks. internal fixation device. [0003] At present, in order to fix fractures and osteotomy parts and promote bone healing and bone union, bone plate with bone plate...

AI Technical Summary

Problems solved by technology

[0003] At present, in order to fix fractures and osteotomy parts and promote bone healing and bone union, osteosynthesis plates with bone plates and screws for fixing the bone plates to bones are used for treatment. The fixed surface angles are different, so there are screw holes corresponding to the vertical angle of the bone contact surface in the bone plate, such as figure 1 As shown, screw a is penetrated through the screw hole b, and then the top c of the screw a is screwed to the screw hole b, so as to limit the position of the screw a nailed in, but because the top b of the screw a is generally smaller than the screw The diameter of the torso part of a should be large, which will lead to a small range of shaking when the screw a is nailed in, making the installation unstable to a certain extent. Therefore, we propose a Lisfranc injury cross-joint locking bone plate

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