The hip is a ball-and-socket joint formed by the femoral head and the acetabulum. The femoral head, an imperfect sphere of cancellous bone sheathed in articular cartilage, is characterized by a relatively dense meshwork of trabecular bone that facilitates the absorption and distribution of weight-bearing stresses to the dense cortical bone of the femoral neck and proximal femur. The size of the femoral head varies more or less in proportion to body mass, ranging from roughly 40 to 60 mm in diameter.1 The thickness of the articular cartilage covering the femoral head averages 4 mm superiorly and tapers to 3 mm at the periphery.2
KeywordsFemoral Neck Femoral Head Femoral Shaft Ligamentum Teres Anterior Inferior Iliac Spine
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