Jang Bob, Kanawati Andrew, Brazil Declan, Bruce Warwick
Department of Orthopaedic Surgery, Concord Hospital, New South Wales, Australia.
Signature Orthopaedics Australia, Chatswood, New South Wales, Australia.
J Orthop. 2013 May 24;10(2):95-8. doi: 10.1016/j.jor.2013.04.007. eCollection 2013.
Fatigue fracture of a femoral component in total hip arthroplasty is a rare occurrence but well documented in the literature. It is understood that proximal loosing of a femoral stem with a well fixed stem distally will result in cantilever bending and eventual fatigue fracture of the stem. Other factors which may potentiate a fatigue fracture are material design, implant positioning, and patient characteristics. More recently, laser etching on the femoral neck of an implant has resulted in fatigue fracture. We report a case of a fatigue fracture at the neck-shoulder junction in a well fixed, uncemented, femoral component due to laser etching in the region of high tensile stress.
全髋关节置换术中股骨部件的疲劳骨折较为罕见，但文献中有充分记载。据了解，股骨柄近端松动而远端固定良好会导致柄部出现悬臂弯曲并最终发生疲劳骨折。其他可能促使发生疲劳骨折的因素包括材料设计、植入物位置以及患者特征。最近，植入物股骨颈上的激光蚀刻导致了疲劳骨折。我们报告一例因高拉应力区域的激光蚀刻导致固定良好的非骨水泥股骨部件在颈肩交界处发生疲劳骨折的病例。
