Chun Young Soo, Juh Hyung Suk, Cho Yoon Je, Rhyu Kee Hyung
Department of Orthopaedic Surgery, Kyung Hee University Hospital at Gangdong, Seoul, Korea.
Department of Orthopaedic Surgery, Kyung Hee University Hospital, Seoul, Korea.
Hip Pelvis. 2015 Sep;27(3):179-82. doi: 10.5371/hp.2015.27.3.179. Epub 2015 Sep 30.
Femoral stem fracture is an uncommon reason for the failure of total hip arthroplasty, with only 16 cases of fully coated stem fractures reported to date. Here we report a case in which a fully coated primary femoral stem fracture occurred after conversion to total hip arthroplasty for the non-union of an intertrochanteric fracture of the femur. Metallurgic evaluation of the etiology and mechanism revealed that the fracture was initiated by fatigue-related failure and completed by ductile failure on the posterior side of the fracture. Considering the recent trend of treating an intertrochanteric fracture with hip arthroplasty, possible stem failure should be considered, since most patients will have at least one of the known risk factors for stem fracture.
股骨柄骨折是全髋关节置换术失败的一个不常见原因，迄今为止仅报道了16例全涂层柄骨折病例。在此，我们报告一例股骨转子间骨折不愈合行全髋关节置换术后发生全涂层初次股骨柄骨折的病例。对病因和机制的金相评估显示，骨折始于疲劳相关失效，并在骨折后侧由韧性失效完成。考虑到目前用髋关节置换术治疗股骨转子间骨折的趋势，应考虑可能发生的柄部失效，因为大多数患者至少有一项已知的柄部骨折危险因素。
