It is the largest ball-and-socket joint. The socket is formed by the acetabulum of the pelvis bone. The ball is the femoral head, which is the upper end of the thigh bone.
A smooth tissue called articular cartilage, lines the surfaces of the joint hence enabling them to move smoothly & easily. Synovial membrane surrounds the hip joint, which secretes synovial fluid that lubricates the joint. Ligaments & capsule connects the ball to the socket and provide stability to the joint.
The damaged bone and cartilage is removed and replaced with prosthetic components.