The Exeter Hip Stem is thought by many to be the “gold standard” prosthetic stem for hip replacement. Developed in 1969, the Exeter Stem reached one million implantations by 2010 and, among its accolades, received the award of special commendation by the British Orthopaedic Association. More Exeter Stems have been implanted than any other type, and today it remains the number one, most implanted hip stem in the world.
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A hip replacement operation starts with an incision over the outer aspect of the thigh. In order to expose the joint, muscles have to be split and dissected. The hip joint is then dislocated. The ball of the hip joint is removed using a saw.
The most important part of the surgery involves the preparation of the bone prior to the injection of cement. Mr Lawrence has perfected this step and creates a very rough surface. When the cement is pressurised into the bone, fixation occurs that can last decades. The plastic cup is then inserted into the cement and held in place until the cement hardens.
When the thigh bone is prepared, a rasp is used to open up the central canal. Cement is then injected into the canal and pressurised. A stainless steel stem is then inserted into the semi-solid cement and held in the correct position until the cement hardens. Mr. Lawrence uses the Exeter Hip Replacement which is the best performing implant in National Joint Registry.
When the ball of the hip joint is placed into the socket, there are no strings or ties between the ball and the socket of the new hip joint. As a result, the stability of the new hip replacement depends on the pull of the surrounding muscles. Eventually, scar tissue will add further support.
Muscles are then carefully repaired. Mr Lawrence takes great care in repairing all of the tissues and a dissolving internal stitch is used for skin repair which minimises scar formation.