- 期刊
- OpenAccess
Broken lag screw of dynamic hip screw in intertrochanteric fracture-A case report
摘要
Dynamic hip screw (DHS) fixation is a commonly performed procedure to treat intertrochanteric fracture. We report an extremely rare complication of hip screw with nonunion following internal fixation of intertrochanteric fracture in a 68-year-old male with right intertrochanteric fracture (Arbeitsgemeinschaft für Osteosynthesefragen-Orthopaedic Trauma Association [AOOTA] 31-A2.2 hip fracture) treated with DHS fixation. Postoperative follow-up X-ray films of right hip revealed nonunion and implant failure due to breakage of lag screw six months after first operation. Revision surgery was done with removal of broken implant and hemiarthroplasty of hip joint. The postoperative course after the second hip operation was smooth for more than five years. According to literature review, broken lag screw in DHS fixation is rarely reported. Nonunion over the fracture site and suboptimal implant selection are the possible reasons for implant failure. In this case, implant failure might be caused by stress concentration over the long lag screw due to inappropriate match of long lag screw with short barrel side plate. This case serves as a reminder to prevent suboptimal implant selection to avoid using a lag screw that is too long with a short barrel side-plate in order to prevent this type of complication.
延伸閱讀
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