The Anatomical Location Of Acetabulum's Lunate Surface

Description

Centered on the hip bone, the animation isolates the acetabulum on the lateral aspect of the pelvic girdle and then tracks along the smooth, crescentic lunate surface that lines the peripheral acetabular socket. As the sequence progresses, the nonarticular acetabular fossa is contrasted medially and centrally against the articular facet, while the acetabular notch is identified inferiorly. Orientation cues keep the viewer grounded in anatomical position, with the lunate surface wrapping anterosuperiorly and posteroinferiorly around the socket rather than forming a complete ring. For teaching hip joint congruence, few landmarks matter more than the lunate surface because it defines where the femoral head bears load under physiologic stance and gait. The animated reveal clarifies how the articular cartilage is distributed on the horseshoe-shaped facet, a point that helps explain why chondral delamination and early osteoarthritic change often concentrate in the anterosuperior acetabulum in femoroacetabular impingement (cam and pincer morphologies). Seeing the facet’s continuous arc in motion also supports discussions of labral pathology at the acetabular rim, where a rim fracture or overcoverage can alter contact mechanics. Use this clip in pelvic anatomy and lower limb modules, in orthopedic and sports medicine lectures on femoroacetabular impingement and hip osteoarthritis, or as a rim-and-socket orientation insert for arthroscopy and total hip arthroplasty education. It also fits well in radiology teaching when correlating the acetabular cartilage-bearing zone with CT or MR arthrography findings. Anatomical accuracy verified by SciePro's Medical Advisory Board.