The Polymotion Hip Resurfacing device is an allergy-free device that uses a 3mm-thick cup made with a material known as cross-linked polyethylene, one of the toughest plastics in existence.
Traditional metal-on-metal hip resurfacing uses cobalt chromium alloy, explains Mr Derek McMinn, a consultant orthopaedic surgeon at BMI Edgbaston Hospital in Birmingham, who developed the new procedure.
‘Metal reactions vary in severity, but in the worst cases can lead to necrosis [death] of surrounding hip muscle and permanent disability for the patient,’ he said.
Another benefit of the capping procedure is that less bone is removed, in contrast to total hip replacements when the femoral head (ball joint of the hip) is replaced by a stemmed device and very little of the upper leg bone is retained.
Replacement hip joints can also wear out in more active patients.
During the two-hour resurfacing procedure, the ball and socket of the hip joint …