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  • The Hip and Knee Institute

    This site is brought to you by Dr. Herbert D. Huddleston, a Board Certified Orthopedic Surgeon in Los Angeles who specializes in Hip and Knee Replacement.

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  • Total Knee Replacement (TKR)

    Total Knee Replacement (TKR) procedure replaces all or part of the hip joint with an artificial device (prosthesis) to eliminate pain and restore joint movement.


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  • Total Hip Replacement (THR)

    Total Hip Replacement (THR) procedure replaces all or part of the hip joint with an artificial device (prosthesis) to eliminate pain and restore joint movement.


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Conveniently Located in Los Angeles County
  • Total Hip Replacement (THR)

    The modern Hip Replacement (also known as Hip Arthroplasty) was invented in 1962 by...

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  • Joy of Motion Newsletter

    Download Dr. Huddleston's Latest Joy of Motion Newsletter

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  • Hip Surgery Procedures

    The hip joint can be approached from several different angles. With minimally invasive hip...

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This site is brought to you by Dr. Herbert D. Huddleston, a Board Certified Orthopedic Surgeon in Los Angeles who specializes in Hip and Knee Replacement. Dr. Huddleston has performed more than six thousand hip replacements, and five thousand knee replacements. There are very few surgeons in the world who can match this experience.

Two highly specialized surgeons practice through the Hip and Knee Institute, Dr. Herbert D. Huddleston and Dr. Erik Zeegen. Both are Fellowship-trained in, and both restrict their practice to, reconstructive surgery of the adult hip and knee.
The hip joint is a “ball and socket” joint. The upper end of the femur is formed into a round ball (the “head” of the femur). A cavity in the pelvic bone forms the socket (acetabulum). The head of the femur and the socket are covered with a layer of smooth cartilage which 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.
The knee is a “hinge” joint which is formed by the femur (thigh bone) and the tibia (shin bone). The knee cap (patella) also forms part of the knee joint. The moving parts of a normal knee are covered with a layer of articular cartilage.

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. In a total knee replacement, this damaged cartilage is removed and replaced with metal and plastic prostheses.

Please feel free to browse either the hip or the knee information contained on this site depending on your interest. You can download the entire manual online, or either Arthritis of the Knee Joint or Arthritis of the Hip Joint, which you can browse at your leisure page by page. Or, you may download the manuals as Adobe Acrobat (PDF) files and peruse offline. If you require information beyond what is available on this site, please feel free to contact Dr. Huddleston.


Contact Us

Dr. H.D. Huddleston
The Hip and Knee Institute
5525 Etiwanda Ave., #324
Tarzana, CA 91356
Tel: 818.708.9090


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Arthritis of the Hip Joint and the Knee Joint copyright © 2005 Herbert D. Huddleston, MD. About Dr. H Hips Knees Testimonials Newsletter Contact