Anti-rotation intramedullary nail system of proximal femoral bionic arm reconstruction support

Abstract

The invention belongs to the field of medical equipment, and particularly relates to an anti-rotation intramedullary nail system of a proximal femoral bionic arm reconstruction support. The anti-rotation intramedullary nail system comprises a main nail and a pressure nail, and is characterized by further comprising at least one tension nail, wherein the main nail, the pressure nail and the tensionnail form at least one triangular support structure, a near end section and a far end section of the main nail are integrally formed, the near end section is provided with a first nail hole and a second nail hole, the first nail hole fixes the tension nail, and the second nail hole fixes the pressure nail. The anti-rotation intramedullary nail system has the beneficial effects that the system isconsistent with anatomy of the femoral medullary cavity in a lateral position, the main nail of the side bent proximal femoral anti-rotation intramedullary nail can be lengthened even to the overall length of the femoral medullary cavity, and then the system can be used in femoral shaft fracture and multiple femoral fractures, thereby enlarging the use scope; the system effectively prevents the hip joint from inverting, femoral neck from shortening, femoral part from displacing inwardly, and femoral head and neck from rotating and deforming, an internal fixing device is prevented from breaking, loosing and releasing from the femoral neck internal fixing device, a power screw or a screw blade is prevented from cutting out, and femur stress fracture is prevented.

Description

technical field [0001] The invention belongs to the field of medical equipment, and in particular relates to a bionic force arm reconstruction support anti-rotation intramedullary nail system at the proximal end of the femur. Background technique [0002] With the aging population in China, the number of intertrochanteric fractures in the elderly is gradually increasing, accounting for about 50% of hip fractures. The disease makes people lose the ability to move their lower limbs. Conservative treatment requires long-term bed rest. There are many complications, which seriously threaten the lives of patients. Elderly patients are often combined with osteoporosis, and the proportion of unstable intertrochanteric fractures after trauma gradually increases [2] . In the treatment of unstable intertrochanteric fractures, the failure rate of internal fixation is high, and the main internal fixation failure results include: helical blade cut out from the femoral head, coxa varus a...

AI Technical Summary

Problems solved by technology

[0004] At present, the existing intramedullary nailing system forms a lever-like structure after operation. When treating unstable intertrochanteric fractures, it can completely replace the bone tissue to bear the stress of loading. Poor shear performance

At the level of structural design, the existing intramedullary nail system does not pay attention to the replacement and reconstruction of the normal intertrochanteric part of the proximal femur and the composite structure of the pressure trabecular arm and the tension trabecular arm in the femoral head and neck bones. The importance of the stable support structure of the "ward triangle" formed by the tension trabeculae and the pressure trabeculae

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