Preoperative Gluteal Muscle Atrophy: A Silent Predictor of THA Dislocation.

Preoperative Gluteal Muscle Atrophy: A Silent Predictor of THA Dislocation.

This study looks at how fat buildup in hip muscles relates to hip osteoarthritis and less favorable recovery after hip replacement surgery. While it is known that weak gluteal muscles might cause problems, it is not yet proven if this specifically leads to hip dislocation after surgery. The goal of this study is to compare fat buildup in gluteal muscles between patients who had a hip dislocation soon after surgery and those who did not.

Inclusion Criteria:

• primary THA with preoperative CT-scan

Exclusion Criteria:

• malposition of acetabular implants outside the Lewinneck safe zone,
• neurological or cognitive disorders,
• associated spinal pathologies (within the context of a hip-spine syndrome),
• chronic alcoholism,
• aseptic osteonecrosis,
• revision surgeries,
• late dislocations attributed to polyethylene wear,
• replacement following post-traumatic coxarthrosis due to acetabulum injuries.
• diameters of the prosthetic heads ≠ 32mm