Hip Fractures | Broken Hip Treatment | Florida Orthopedics The socket is formed by the large pelvis bone (acetabulum) and the ball on the upper end of the thighbone (femoral head) A slippery tissue known as the articular cartilage covers the surface of joint, creating a smooth surface that allows the bones to glide easily across each other
Anterior Hip Replacement | Florida Orthopaedic Institute The ball (or femoral head) is the upper end of the femur (thighbone) The bone surfaces of the ball and socket are covered with articular cartilage, a smooth tissue that cushions the ends of the bones and enables them to move easily