Mr Michael Moss

Consultant Orthopaedic Surgeon

01243 753032

info@michaelmoss.info

Not infrequently, especially in women, the area of the knee between the underside of the patella (kneecap) and the front of the femur (thigh bone) wears out. The patient particularly notices a crunching sensation within the joint and problems on inclines or stairs as well as getting up out of chairs.

If this happens in isolation then the front surface of the femur (trochlea) is resurfaced with a metal prosthesis and a polythylene or plastic implant resurfaces the underside of the patella. The attraction here of course is that if only the patella or kneecap is worn, the patient may keep the rest of the natural knee without operation whilst a much reduced procedure is performed to resurface the patellofemoral joint.

This procedure is much smaller than a total knee replacement and patients achieve a faster recovery.

If wear and tear subsequently occurs in the main part of the knee joint, it is possible to resurface that area around the patellofemoral replacement without resorting to a total knee joint replacement.

Frequently Asked Questions

Why do so many people need their joints replaced?

The most common reason is osteoarthritis which causes a patient to experience aching, stiffness, and eventual loss of mobility within the knee joint. Inflammation may or may not be present. The pain may be severe at times, followed by periods of relative relief. It often worsens after extensive use of the knee and is more likely to occur at night than in the morning. Stiffness tends to follow periods of inactivity, such as sleep or sitting and can be eased by stretching and exercise. Pain also seems to increase in humid weather. As the disease progresses, the pain may occur even when the joint is at rest and can keep the sufferer awake at night.