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Consumer/ Patient Info » Conditions/ Procedures » Hips |
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HIPS
The hip is one of the largest weight-bearing joints in the body. When
it's working properly, it lets you walk, sit, bend, and turn without
pain. Unlike the shoulder, the hip sacrifices degree of movement for
additional stability. To keep it moving smoothly, a complex network of
bones, cartilage, muscles, ligaments, and tendons must all work in
harmony.
The hip is a ball-and-socket joint where the head of the femur
articulates with the cuplike acetabulum of the pelvic bone. The
acetabulum fits tightly around the head of the femur. The ball is
normally held in the socket by very powerful ligaments that form a
complete sleeve around the joint (the joint capsule). The capsule has a
delicate lining (the synovium). The head of the femur is covered with a
layer of smooth cartilage which is a fairly soft, white substance. The
socket is also lined with cartilage. This cartilage cushions the joint,
and allows the bones to move on each other with very little friction.
An x-ray of the hip joint usually shows a "space" between the ball and
the socket because the cartilage does not show up on x-rays. In the
normal hip this "joint space" is approximately 1/4 inch wide and fairly
even in outline.
Click on the topics below
:: Hip anatomy
:: Arthritis of the Hip Joint
Normal anatomy of the hip joint
How does the hip joint work? Find out more in this web based movie.


Arthritis of the hip joint
The term arthritis literally means inflammation of a joint, but is
generally used to describe any condition in which there is damage to the
cartilage.
Click here to go to the
section on arthritis.

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