Acta Medica Okayama 74巻 2号
2020-04 発行
Yamamoto, Norio
Department of Orthopedic Surgery, Unnan City Hospital
Dan’ura, Tomoyuki
Department of Orthopedic Surgery, Unnan City Hospital
Noda, Tomoyuki
Department of Musculoskeletal Traumatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
ORCID
Kaken ID
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Ozaki, Toshifumi
Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
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This is the second report of an atypical peri-implant femoral fracture occurring at the distal screw after intramedullary nail fixation of a pertrochanteric fracture. A 94-year-old Japanese female with a 5-year history of alendronate intake presented with prodromal pain in her right thigh after intramedullary nail fixation. Plain radiographs showed an incomplete noncomminuted transverse fracture at the distal screw, suggesting an atypical peri-implant femoral fracture. The pathogenesis of an atypical peri-implant femoral fracture could be a combined systemic bone metabolism disorder and repetitive overloading at the screw, similar to the pathogenesis of an atypical periprosthetic femoral fracture around stem implantation.
atypical femoral fracture
insufficiency fracture
bisphosphonate
atypical peri-implant femoral fracture,
atypical periprosthetic femoral fracture