Locking gamma nail

Abstract

The invention relates to an orthopedic implant medical apparatus, in particular to a locking gamma nail used for treating instable intertrochanteric fracture. The locking gamma nail comprises a locking screw and a main nail which are screwed in a femoral neck, wherein the main nail is provided with a locking screw hole; the locking screw comprises a stud and a polish rod. The locking gamma nail is characterized in that: the locking screw hole is in threaded connection with the polish rod. The invention aims to provide the locking gamma nail capable of remaining a bone block at a fracture end stable while treating the instable intertrochanteric fracture. Compared with the prior art, the locking gamma nail has the advantages of firm static fixation, more contribution to the stability of fracture and capability of providing more intraoperative choices for doctors, can clinically reduce complications caused by repeated displacement of the fracture end after comminuted fracture operation, and creates conditions of early functional exercise and early recovery for patients.

Description

technical field [0001] The invention relates to an orthopedic internal implant medical device, in particular to a locking gamma nail used for treating unstable intertrochanteric fractures of the femur. Background technique [0002] The design of the Gamma nail originated in Europe, and Grosse (1989) applied the Gamma nail to the treatment of intertrochanteric fractures. Since Halder et al. (1992) reported the surgical technique of Gamma (Gamma) nail, it has been used as a classic surgical technique till now. [0003] Gamma nails include locking screws and main nails, and the smooth fit between the locking screws and the main nails is a smooth fit between the outer circle of φ7.5mm and the inner hole of φ7.7mm (such as figure 1 shown). [0004] Gamma nails combine the advantages of hip sliding compression nails and intramedullary fixation, and are easy to operate, strong in fixation and have the advantages of dynamic compression, especially the dynamic compression effect fo...

AI Technical Summary

Problems solved by technology

However, for patients with Evans IV type fractures, comminuted trochanter, elderly severe osteoporosis, split trochanter, and Parkinson's disease, after fixation with Gamma nails, the existence of dynamic compression at the fracture end will make the Under the action of stress, the fracture ends can be re-stabilised through compression (that is, the overall decline of the femoral head and lag screws resulting in shortening of the fracture ends), varus, and screw cutting to achieve re-stabilization of the fracture. The greater the distortion that occurs in order to achieve stability; resulting in fracture displacement, coxa varus, shortening of the affected limb, lag screw retraction, and early lag screw appearance in patients with Parkinson's disease due to continuous shaking of the affected limb Loosening and withdrawal of nails, leading to complications such as failure of internal fixation

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