The hip is a simple ball and socket joint that has a wide range of movement in all directions and its efficient function is essential to normal hind limb movement. The joint itself is comprised of the acetabulum which is a cup shaped depression in the pelvis (this forms the ’socket’) and the femoral head which is art of the femur (thighbone). The femoral head forms the ’ball’ of the ’ball and socket’ joint. The stability of the hip joint comes from the joint capsule, a short ligament that connects the ball to the socket and the muscles that surround the hip.
What is meant by hip dislocation?
When the hip dislocates, the femoral head is displaced from the acetabulum (out of socket); in most cases, the femoral head will be positioned above and in front of the acetabulum. The most common cause of hip dislocation is blunt force trauma such as a fall or an automobile injury, but any traumatic injury to the hip area may cause a hip dislocation.
“The most common cause of hip dislocation is blunt force trauma such as a fall or an automobile injury.”
An increasing number of cats, especially pure-breed cats, are being diagnosed with hip dysplasia (poor hip joint conformation) similar to that seen in dogs. Hip dysplasia may predispose an individual cat to hip dislocation.