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Have you been advised a hip replacement operation?
If yes
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The hip joint may need to be replaced with an artificial joint when it is irreversibly damaged and cannot be salvaged by alternate surgery. The patient complains of pain and restriction of movement. The pain may often be referred to the knee or felt in the knee and no hip symptoms. Occasionally the pain may be felt more in the buttock area rather than in front of the groin.
Who needs a hip replacement?
In India, many young patients with ankylosing spondylitis, avascular
necrosis
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advised a hip replacement for disabling pain. Thus many hip replacement operations are performed in younger patients. The surgery should cater to the enhanced demands on an artificial joint by younger and more active patients. Naturally an operation designed for Western elderly patients is not suitable for younger patients.
The other category of persons who need hip replacement are elderly with a hip fracture. In this group a partial or total hip replacement may be required. In this group
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What is a total hip replacement?
In this operation the ball shaped upper end of the thigh bone (femur) and the socket (acetabulum) are replaced. The ball is replaced with a long metal stem that is fixed into the upper end if the thigh bone. Its upper spherical end articulates with a cup shaped polyethylene socket that is cemented into the pelvis.
Model of a total hip replacement
Conventional hip replacements sacrifice a great deal of normal bone as the head, neck, and upper part of the thigh bone is removed for implantation of the prosthesis. Moreover wear debris from the polythetheylene liner lead to osteolysis and bone loss. When this first hip is to be changed or revised after its lifespan more bone loss occurs. Conventional hips have a small ball to reduce friction and wear
Marek Mazanec Jersey , but the ill effect of this is an increased risk of dislocation. An average dislocation rate of 3- 4 % has been reported. These implants do not last very longer than 20 years and revision rates of 50% at 20 years have been reported. Survival rates are less satisfactory for the relatively younger active patients. Thus a total hip replacement is not an ideal implant for younger patients less than fifty years old who need a new hip. It is however the best option in elderly people.
Problems with conventional total hip replacement:
A total hip replacement is an excellent & time tested operation in the elderly. However in the young problems may arise. These are
(1) Excessive bone sacrifice and loss
(2) Increased risk of dislocation
(3) Patients cannot squat or sit cross legged on the floor with out the risk of dislocatio