Medial Calcar Restoration Using Femoral Head Autograft in Conversion Hip Arthroplasty for Failed Fixation after an Unstable Intertrochanteric Hip Fracture: A Case Report and Technique Description.

Introduction: The calcar femorale helps manage compressive loads on the femoral head and is an essential component in determining intertrochanteric (IT) femur fracture stability. Fracture fixation can be complicated when primary fixation techniques, such as cephalomedullary nailing fail. Unstable IT femur fractures involving disruption of the medial calcar present additional fixation challenges.

Case Report: This case reports a patient with unstable IT fracture due to medial calcar disruption that experienced failure of a short cephalomedullary nail. Secondary fixation involved total hip arthroplasty (THA) with medical calcar reconstruction using femoral head autograft. Outcomes were good at 2-year follow-up with a full return to baseline activities.

Conclusion: The results indicate that femoral head autografting can be a viable option, with good outcomes, for medial calcar reconstruction in cases of failed IT fracture fixations without calcar support, converted to THA.