Miyamoto Ryota, Goto Yasushi, Fujito Toshitaka, Abe Hirohito, Kunugiza Yasuo
Department of Orthopaedics, Osaka International Cancer Institute, Osaka, Japan.
Department of Orthopaedic Surgery, Japan Community Health Care Organization Hoshigaoka Medical Center, Osaka, Japan.
Radiol Case Rep. 2025 Jan 18;20(4):1900-1903. doi: 10.1016/j.radcr.2025.01.019. eCollection 2025 Apr.
Total knee replacement with mega prosthesis for periprosthetic fractures after total knee arthroplasty is related to early functional recovery, but aseptic loosening of the implant has been a major reoperation factor in the long-term outcome of total knee replacement with mega prosthesis. Extracortical bone formation caused by bone-collar interface osteointegration may decrease the probability of aseptic loosening by promoting bone formation and improving bone-implant fixation. Here, we report a case of total knee replacement using mega prosthesis with porous-coated collar showing extra bone growth without osteointegration of prosthesis and leading to aseptic loosening.
全膝关节置换术后使用大型假体治疗假体周围骨折与早期功能恢复相关，但假体无菌性松动一直是大型假体全膝关节置换长期疗效的主要再次手术因素。骨皮质外骨形成由骨领界面骨整合引起，可通过促进骨形成和改善骨与假体的固定来降低无菌性松动的可能性。在此，我们报告一例使用带多孔涂层骨领的大型假体进行全膝关节置换的病例，该病例显示有额外的骨生长，但假体未发生骨整合并导致无菌性松动。
