The acetabular labrum is a ring of cartilage that surrounds the socket of the hip joint, known as the acetabulum. It plays a crucial role in maintaining the stability and mobility of the hip joint. A tear in the acetabular labrum, also known as a labral tear, can cause significant pain and discomfort. It is a fibrocartilaginous structure that attaches to the rim of the acetabulum. It is composed of dense connective tissue and has a thickness of approximately 2-3 mm. The labrum serves several functions, including:
- Stabilization- The labrum helps to deepen the acetabulum, increasing the surface area for the femoral head to articulate.
- Shock absorption-The labrum acts as a shock absorber, reducing the impact of forces transmitted through the hip joint.
- Lubrication- The labrum helps to distribute synovial fluid throughout the joint, reducing friction and wear on the articular surfaces.