A total hip replacement (THR) is a surgical procedure whereby the damaged or worn cartilage and bone around the hip joint are removed and replaced with artificial components (usually titanium-based). These pieces are then fixed to the end of the femur (thigh bone) and acetabulum (hip socket) and a piece of special, longwearing, plastic (highly cross-linked polyethylene) is placed between them. One or more specialised bone screws may also be used to achieve optimal socket fixation to facilitate immediate safe weight bearing (walking). Just like there are many makes and models of motorcar, there are many different brands and sizes of hip replacements. Associate Professor Kurmis will choose a type of hip replacement that best suits your hip and desired function.