HEAD & NECK EXCISION ARTHROPLASTY
Femoral Head and Neck Excision Arthroplasty refers to the removal of the articulating, ball at the top of the thigh bone (femur). This procedure has been used for the management of a range of conditions involving the hip joint. The most common reasons for this are untreatable hip joint fractures, chronic dislocations, osteoarthritis, hip dysplasia and hip pain, in cases where total hip replacement are not considered viable. The reason for the procedure is to remove the direct contact of the thigh and hips bones to remove the pain associated with this boney contact.
The outcomes following surgery are generally good in smaller patients, but may be variable in larger patients where there is more weight being transferred through the joint. The "ball" part of the ball and socket joint is removed, so the bone and joint pain is generally relieved, and the load of the joint is then taken up by the muscles to carry the body weight in the standing patient. Total hip replacement may be the preferred option to restore anatomical joint function, but should that procedure not be an option for patients, then a femoral head excision arthroplasty, combined with good, proactive, rehabilitation, physiotherapy and hydrotherapy will often return patients to very good function.
Mechanical lameness, or an observable rise of the hip muscles, on the side of the surgery may occur long-term following removal of the joint, however with extensive physiotherapy, rehabilitation and exercise this instability will improve and the patients recovery in the short and longer-terms should be good. Physiotherapy may begin immediately following surgery, with ice and heat therapy, massage, gentle hip range of motion exercises and lead controlled walks. Consultation with a physiotherapist would be advised following this surgery.
Complications rates are low, with the most common complications being infection (2-4%).
Other complications may be temporary paresis of the large nerve running at the back of the hip joint (sciatic nerve), which may be related to the initial injury or the traction applied during surgery itself, however this paresis will generally resolve in the days to weeks following surgery. In a small number of cases this paralysis may be permanent.