Memory pressurization hip lag screw system

Abstract

The invention belongs to the technical field of medical appliances and particularly relates to a memory pressurization hip lag screw system. The system comprises a memory pressurization hip lag screw, a hip lag screw sleeve and a lateral pressurization steel plate, wherein the memory pressurization hip lag screw is divided into a head part, a body part and a tail part, the front side of the head part is in a forky semicircular structure with screw threads, the side surface of the head part is in a spindle shape with screw threads and the head part forms an included angle being 135 to 150 degrees with the body part, the body part is in a hollow cylinder shape, and the tail part is in a cylinder shape provided with a hollow inner cavity and screw threads. The memory pressurization hip lag screw system can be used for old femur intertrochanteric fracture fixing, the rotation, pulling-out and cutting-out stress can be effectively resisted, the stability of the fracture end is enhanced, and the fracture healing is favorably realized. The memory pressurization hip lag screw system has the advantages that the operation is simple, the popularization is convenient, and the system can be implemented in any hospital.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a nickel-titanium memory compression lag screw system used for hips to fix senile intertrochanteric fractures. Background technique [0002] Currently, there are extramedullary fixation systems and intramedullary fixation systems for the treatment of intertrochanteric fractures. [0003] Extramedullary fixation systems include Jewett plate, angle plate, dynamic hip screw, dynamic condylar screw, Gorfried plate, and proximal femoral locking plate. Among them, the most widely used dynamic hip screw is considered to be the gold standard for the treatment of stable intertrochanteric fractures. Intramedullary fixation systems include Gamma nails, PFN and reconstruction nails. [0004] The dynamic hip screw (dynamic hip screw, DHS) has dual functions of compression and sliding, allowing the proximal comminuted fracture fragments to be compressed, so that the fract...

AI Technical Summary

Problems solved by technology

The biggest disadvantage is: there is only one lag screw, and the ability to resist rotation, pull out and cut out is poor

However, it is not easy to satisfactorily place two screws with a large diameter in the narrow femoral neck, especially for elderly patients with severe osteoporosis, multiple resets and screw penetration are not allowed, which further increases the difficulty of the operation

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