Acetabular Hip: The Importance of Proper Orientation in Total Hip Arthroplasty

In the field of orthopedic surgery, proper cup orientation is a crucial step in the total hip arthroplasty (THA) procedure. The acetabular cup positioning has a significant impact on the outcome of THA, affecting dislocation rate, component impingement, edge loading, accelerated bearing surface wear, and osteolysis or loosening. At Stanford Medicine Children's Health, our doctors specialize in treating young hips and preventing arthritis and pain in the future.

As part of the first comprehensive program on the West Coast that treats hip problems in all stages of life, we understand the importance of accurate acetabular cup positioning. The surgery not only improves hip function but also reduces pain and stops the damage occurring inside the hip joint. For teens and young adults with acetabular dysplasia, a periacetabular osteotomy (PAO) is often the preferred treatment. This surgical procedure repositions the acetabulum into a more stable position, ensuring proper coverage of the femoral head.

At Stanford Medicine Children's Health, our doctors diagnose acetabular dysplasia through several tests, including imaging studies such as X-rays and MRIs to show different views of the hip, the degree of dysplasia, and any damage to the cartilage and labrum. We also conduct physical exams that include the positive anterior impingement test, which tests for irritation of the acetabular labrum when the hip is flexed and turned inward, and the positive anterior apprehension test, which tests for instability of the hip when it is extended and turned out.

In addition to these tests, we assess the overall range of motion of the hip in flexion, extension, internal rotation, and external rotation. If your child has acetabular dysplasia, they may experience symptoms such as feelings of instability or their hip or leg giving way. Our doctors are dedicated to providing personalized treatment plans that address each patient's unique needs and improve their quality of life.

In some cases, operative treatment may consist of open reduction and internal fixation (ORIF) or total hip arthroplasty. At Stanford Medicine Children's Health, we are committed to staying at the forefront of medical research, continually working to improve care and outcomes for our patients. With our expertise in treating acetabular dysplasia, you can trust that your child is in good hands.

Acetabular hip