Study of proximal femoral locking plate internal fixation after dynamic hip fixation intertrochanteric fracture / 局解手术学杂志

ABSTRACT

Objective To study the mechanics situation of proximal femoral locking plate internal fixation after dynamic hip fixation in-tertrochanteric fracture. Methods Totally 10 couple of elderly proximal femur specimens were collected and intertrochanteric fracture model were prepared. Fixation material was removed after dynamic hip screw fixation. The left sides were collected as control group and given anti-rotation intramedullary nail internal fixation, while the right side were collected as observation group and given proximal femoral locking plate internal fixation. Then vertical displacement, axial stiffness and rotational stiffness under different loads were compared. Results Under dif-ferent loads, femoral bone vertical displacement and femur tuberosity vertical displacement in the observation group were both significantly shorter than those in the control group (P<0. 05), and femoral bone and femur tuberosity axial stiffness and rotational stiffness in the observation group were significantly higher than those of the control group (P<0. 05). Conclusion Proximal femoral locking plate internal fixation can improve stress load and enhance axial stiffness and rotational stiffness, and it's an ideal material for refracture fixation model after dynamic hip fixation intertrochanteric fracture.