Anatomical Characteristics And Location Of Acetabular Margin Of The Hip Bone

Description

Acetabular margin (rim) of the os coxae forms the sharp, curved boundary of the acetabulum on the lateral aspect of the pelvic girdle. Along the rim, the anterior segment lies anterolateral to the acetabular fossa and approaches the pubic contribution of the hip bone, while the posterior segment sweeps posterolaterally toward the ischial portion. Inferiorly, the rim is interrupted by the acetabular notch, a gap bridged by the transverse acetabular ligament at the inferior acetabular margin. A tight border. Rim anatomy matters because it defines the bony constraint for the femoral head and the attachment base for the acetabular labrum, so subtle contour differences at the anterior and superior margin are directly relevant to femoroacetabular impingement, including pincer morphology and mixed cam-pincer patterns. Surgeons planning hip arthroscopy or open acetabular rim trimming need a dependable mental map of how the margin relates to the adjacent lunate surface (the articular horseshoe) and the non-articular acetabular fossa, and where the inferior notch interrupts an otherwise continuous osseous ring. Fracture patterns also track rim and column anatomy, with posterior wall and anterior column injuries described in relation to these margins on plain radiographs and CT. Use this illustration in pelvis and lower limb anatomy courses to anchor terminology such as acetabular margin, acetabular notch, and acetabular labrum attachment, and in orthopaedic teaching files covering acetabular fractures, hip dysplasia, and femoroacetabular impingement. It also suits medical publishing layouts that need an isolated bony landmark for labeling, including os coxae, pelvis, and skeletal system plates. Anatomical accuracy verified by SciePro's Medical Advisory Board.