Normal Anatomy of the Hip joint
How does the Hip joint work?
Find out more in this web based movie.
Total Hip Replacement (THR) procedure replaces total or part of the hip joint with an artificial device (prosthesis) to alleviate pain and restore joint movement.
Find out more about Total Hip Replacement (THR) with the following links.
Hip Resurfacing or bone conserving procedure replaces the acetabulum (hip socket) and resurfaces the femoral head. This means the femoral head has some or very little bone removed and replaced with the metal component. This spares the femoral canal.
Find out more about Hip Resurfacing with the following links.
This maybe because complete or a part of your previous hip replacement needs to be revised. This operation varies from a minor adjustment to a massive operation replacing significant amount of bone and hence is difficult to describe in full.
Find out more about Revision Hip Replacement with the following links.
Amongst the many recent advances in joint replacement surgery, both surgeons and patients have driven interest in early functional recovery and rapid/enhanced recovery protocols.
Find out more about Whats new in Total Hip Replacement? with the following links.
Primary Total Hip Arthroplasty
The thigh bone (femur) and the pelvis (acetabulum) join to form the hip joint. The joint surface is covered by a smooth articular surface that allows pain free movement in the joint. This surface can wear out for a number of reasons; often the definite cause is not known. When the articular cartilage wears out, the bone ends rub on one another and cause pain. Hip arthritis is a common type of joint disease in which the normal cartilage surface of the joint wears out causing pain. Total hip arthroplasty surgery is an option to relieve severe arthritis pain that limits your daily activities.
Primary Total Hip Arthroplasty is a surgical procedure in which the damaged cartilage and bone is removed from the hip joint and replaced with artificial components. This can help relieve pain and restore the normal alignment and function of your hip.
The surgery is performed under sterile conditions in the operating theatre under spinal or general anaesthesia. An incision is made over the hip to expose the hip joint. The femur (thigh bone) is separated from the acetabulum (hipbone socket).
- The acetabulum (socket) is prepared using a special instrument called a reamer.
- The acetabular component is then inserted into the socket. This is sometimes reinforced with screws or occasionally cemented.
- A liner, which can be made of plastic, metal or ceramic material, is then placed inside the acetabular component
- The femur (thigh bone) is then prepared. The femoral head which is arthritic is cut off and the bone prepared using special instruments to exactly fit the new metal femoral component.
- The femoral component is then inserted into the femur. This may be press fit relying on bone to grow into it or cemented depending on a number of factors such as bone quality and surgeon’s preference.
- The real femoral head component is then placed on the femoral stem. This can be made of metal or ceramic.
- The artificial components are fixed in place. The muscles and tendons are then repaired and the skin is closed.
After undergoing total hip replacement, you must take special care to prevent the new joint from dislocating and to ensure proper healing. Some of the common precautions to be taken include:
- Avoid combined movement of bending your hip and turning your foot inwards
- Keep a pillow between your legs while sleeping for 6 weeks
- Never cross your legs and bend your hips past a right angle (90)
- Avoid sitting on low chairs
- Avoid bending down to pick up things, instead a grabber can be used to do so
- Use an elevated toilet seat
The possible complications after total hip replacement include:
- Fracture of the femur or pelvis
- Injury to nerves or blood vessels
- Formation of blood clots in the leg veins
- Leg length inequality
- Hip prosthesis may wear out
- Failure to relieve pain
- Scar formation
- Pressure sores