关键词:  , 股骨转子间骨折, 骨质疏松, 几何结构, 股骨近端髓内钉

Abstract:

Objective　To explore the change of proximal femur geometry parameters in old osteoporotic intertrochanteric femoral fracture healing process managed by PFNA.　Methods　Thirty-six old patients with osteoporotic intertrochanteric femoral fracture were chosen. The proximal femur geometric parameters, including top-high-pitch, offset, proximal length, neck-shaft angle, were measured after operation immediately and 1.5 to 2 years after surgical treatments.　Results　After operation, the geometric parameters became smaller, including top-high-pitch being (1.25±0.94) mm, offset (0.36±1.13) mm, proximal length (3.25±3.06) mm, neck-shaft angle (0.22±0.76)°. The proximal length and top-high-pitch were significantly lower (P＜0.05). The other changes were not significant (P＞0.05).　Conclusion　Using PFNA to manage the old osteoporotic intertrochanteric femoral fracture, enables the force to pass through the femoral neck during the fracture healing process, resulting in proximal anatomical structure parameters becoming smaller in different degree. Moreover, acceptable geometric changes contribute to the overall stability of the internal fixation system, which can be helpful to the healing of the fracture.

Key words: Intertrochanteric femoral fracture, Osteoporotic, Proximal femur geometry, PFNA