Intraoperative Femoral Condyle Fracture during Bone Preparation in a Cruciate-retaining Primary Total Knee Arthroplasty.

introductionIntraoperative fracture in revision knee arthroplasty is commonly described. Intraoperative fracture during primary total knee arthroplasty (TKA) is a significant yet infrequently reported complication. The literature about intraoperative fractures during primary TKA is limited. It is usually seen in posterior-stabilized prosthesis during primary TKA, however, its occurrence in cruciate-retaining (CR) primary TKA is rarely reported. CASE REPORT: The authors describe a unique case of intraoperative medial femoral condyle fracture in primary CR TKA during bone preparation. The fracture was managed successfully by fixation with a 3.5 mm screw followed by cemented primary CRTKA. Bony union was achieved with a good clinical outcome as shown by the Knee Society Knee Score of 86 and a Function Score of 90 without any signs of prosthesis failure/loosening at 2 years' follow-up. DISCUSSION: Careful pre-operative evaluation and planning are necessary for patients with risk factors to avoid poor outcome. A stable internal fixation abiding the standard principles of fracture fixation and arthroplasty is needed to achieve a satisfactory functional and radiographic outcome, thus avoids early prosthetic failure.