N-shaped locking palm dorsal bone plate

Abstract

The invention discloses an n-shaped locking palm dorsal bone plate comprising a fixed short locking arm and a fixed long locking arm which are connected into the n shape integrally through a connecting locking arm. Auxiliary locking arms respectively extend from two ends of the connecting locking arm. A plurality of locking holes with internal threads are respectively formed in the fixed short locking arm, the fixed long locking arm, the connecting locking arm and the two auxiliary locking arms along lengths thereof, and the fixed short locking arm, the fixed long locking arm, the connecting locking arm and the two auxiliary locking arms are in arc-shaped arrangement matched with the radius surface respectively. The middle of the connecting locking arm is bent inwards, so that the connecting locking arm, the fixed short locking arm and the fixed long locking arm form an opening fitting with the size of the radius dorsal nodule. The bending angle of the connecting locking arm ranges from 144.5 degrees to 145.5 degrees, the included angle between the fixed short locking arm and the connecting locking arm ranges from 165.5 degrees to the 166.5 degrees, and the included angle between the fixed long locking arm and the connecting locking arm ranges from 169.5 degrees to 170.5 degrees. The n-shaped locking palm dorsal bone plate is premoulded according to the human body anatomy structure and has good locking effect, and excision of the radius dorsal nodule is avoided during use.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to locking the dorsal palmar π-shaped bone plate. Background technique [0002] Distal radius fractures refer to cancellous bone fractures located within 2.5-3 cm from the articular surface of the radiocarpal joint, and there is a dorsal radial tubercle (Listei tubercle) at the distal radius. After the fracture of the distal radius, the reduction of the fracture block and the fusion of the wrist joint are required. At present, the structure of the dorsal volar bone plate used in the repair operation of the distal radius fracture is: it is composed of two fixed arms on the same plane. The body of the T-shaped volar dorsal bone plate is provided with a plurality of tension and pressure holes with smooth walls along the length direction of the two fixed arms respectively. The disadvantage of this kind of dorsal volar bone plate is: on the one hand, since the dorsal volar bone plate ...

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of dorsal volar bone plate is: on the one hand, since the dorsal volar bone plate has smooth tension and pressure holes, doctors can only fix the dorsal volar bone plate with the distal radius through pressurized fixation. The fracture site is fixed, that is, the dorsal palmar bone plate and the fracture site of the distal radius are fixed with the tension nail matched with the tension pressure hole, so that the tension nail can exert pressure on the dorsal palmar bone plate, forcing the dorsal palmar bone joint The plate fits the bone surface of the fractured part of the distal radius, which is not conducive to the recovery of the affected area, but also makes people feel oppressed in the affected area after operation. The stability of the dorsal volar bone plate is poor, and it is easy to fall off; on the other hand, in order to achieve a complete reduction of the fracture site and complete integration of the wrist joint during fracture repair surgery, it is necessary to make the dorsal volar bone plate more in contact with the radial bone. The bone surface of the bone at the distal fracture site fits together, but since the T-shaped dorsal volar bone plate is easy to touch the dorsal tubercle of the radius (Listei tubercle) during installation and fixation, it needs to be placed in the fracture repair operation. Resection of the dorsal radial tubercle (Listei tubercle), thus causing secondary injury to the body

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