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The advantages of articular surface replacement include reduced dislocation, restoration of “normal anatomy”, anatomical loading of the hip joint and preservation of the patient’s natural bone. There is a benefit from increased range in motion and superior restoration of joint function. By utilising the advances in Metal-on-Metal technology the resurfacing procedure offers patients a very durable and long lasting implant that is well suited for higher demand activities and lifestyles.
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The risks associated with a resurfacing procedure are similar to a total hip replacement. In addition a resurfacing replacement may fail due to femoral neck fracture or softening of the bone (avascular necrosis). A revision procedure for a resurfacing implant is relatively simple as the head can be removed and it can be converted to a total hip, similar to a primary total hip procedure.
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Articular surface replacement is similar to a traditional total hip replacement from a surgical perspective. In a resurfacing procedure the head is not removed but with the use of specially designed instruments the femoral head is precisely reshaped to receive the resurfacing implant.
|  | | Traditional Total Hip Replacement |
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The reshaped head is fitted with a metal ball, which is cemented on. The acetabulum (socket) is prepared in a similar fashion for both a traditional total hip replacement and resurfacing with a metal shell being firmly fitted into the acetabular bone. The bone will then grow into the shell to hold it in place.
| | | Hip resurfacing |
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