Mr Michael Moss

Consultant Orthopaedic Surgeon

01243 753032

Over the last 15 years advances in surgical technique and joint design have meant that knee joint replacement has become a reliable and rewarding procedure, not only relieving pain and improving range of movement, but also improving the function of a diseased joint with great success.

Until relatively recently, arthritis of the knee joint caused many problems for surgeons. Historically knee surgery was regarded as a fairly risky undertaking with quite poor outcomes. This often resulted in failure and unfortunately gave knee surgery a poor reputation and standing with the general public.

However, radical redesign of the materials and the shape of joints inserted into the knee has improved beyond all recognition the results from this operation. Nowadays 95% of people undergoing knee joint replacement may expect good to excellent results if the operation is performed by a specialist knee surgeon.

I was fortunate enough to be individually taught by one of the greatest knee surgeons of modern times, Dr John Insall in New York.

The more recent designs of knee joint concentrate on replacing the worn bearing surface of the knee and keep all the other natural components of the joint such as the surrounding ligaments, soft tissues and knee cap intact. This allows minimal removal of the patient’s own tissues and just resurfaces the areas that are worn. As a result the knee is felt to move more naturally and results of these more modern prostheses are much more satisfactory.

The prosthetic knee joint is a complex design made of a type of stainless steel which is tolerated by the body’s own natural tissues and shaped to resemble the real bearing surfaces of the knee. Highly resilient medical grade plastic fits into the gap between the two metal surfaces which cover the ends of the thigh and shin bones in the knee. This in many ways resembles the cartilage of the normal knee joint. The plastic is made of a specially designed high density polyethylene and allows the bearing surface of the femur to move upon it.

The type of knee joint I routinely employ is called the Nexgen Legacy Knee Replacement and it provides extremely reliable and safe results. It is produced by Zimmer, the largest Orthopaedic manufacturing company in the world, and scores the highest Patient Related Outcome Measures (PROM) in many national joint registries. Additionally, it has a long follow up and good track record in excess of 20 years.

Some patients have different shaped knees from the norm and I passionately believe the normal anatomy should be recreated. Specially shaped ‘female’ knees are available routinely as are custom made knees if required. Computer navigation is used if necessary. I was the first UK surgeon trusted by Zimmer to launch their female specific gender knee in this country which has been a great success.

Frequently Asked Questions

What should I expect when I come to hospital?

Following your appointment with Mr Moss, his practice manager Niki Bassett will get in touch to offer you a convenient date and time for admission. Following this discussion you will have an hour-long appointment with our pre-assessment nursing/physiotherapy team. This will be to discuss medical history, medication, recovery after surgery, equipment you may need, home circumstances and any worries you may have regarding your treatment. The nurse will liaise with Mr Moss’s anaesthetist regarding your test results. If the anaesthetist is concerned about your medical history he may ask you to attend another appointment to see him in clinic.

On the day of admission you will be taken to your room by one of our receptionist team. The nurse in charge of your care will confirm your medical history and check your medication has not changed since your pre-assessment appointment. You will then be prepared for theatre. Mr Moss and his anaesthetist will see you prior to theatre to explain fully what they will be doing and consent with be obtained.

Following surgery you will continue to be looked after in your own room by the nursing and physiotherapy staff.

Mr Moss or his anaesthetist will review you on a daily ward round. You will be visited daily by our resident medical doctor who is on-call to answer any questions. You will also be visited by our pharmacist to ensure the pain medication is suitable for you.