Anatomy
The hip bone (os oax) is made up (each side) of 3 bones (ilium, ischium and pubis), separated by hyaline cartilage at birth, fused and united by 25.
The 3 bones meet and form (ilium 40%, ischium 40%, pubis 20%) the acetabulum, a deeply depressed articular cavity, the socket of the ball-and-socket hip joint, with the head of the femur.
Clinical
Hip is ilium, ischium, pubis. Pelvis is 2 hips plus sacrum and coccyx.
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