One of the questions Mr Kosuge is asked frequently at consultations is: "How long will it last?" It is entirely the right question. The answer has improved considerably over the past two decades — and for most patients, it is far more reassuring than they might expect.

What the Registry Data Shows

The National Joint Registry for England, Wales, Northern Ireland and the Isle of Man is one of the most comprehensive databases of joint replacement outcomes in the world. Its data consistently shows that the majority of hip and knee replacements performed today are still functioning well at 15 to 20 years. For hip replacement, the 20-year survival rate for cemented implants in appropriate patients is above 90%. Knee replacement data tells a similar story.

These are population-level figures. Individual outcomes depend on a number of factors — but for the typical patient, the probability of needing a revision operation within 20 years is relatively low.

What Affects How Long an Implant Lasts?

Several factors influence longevity. Activity level is relevant — higher-impact activities place greater stress on your hip or knee replacement. Body weight matters, as excess load accelerates wear. Age at the time of surgery is a factor, not because younger patients have worse outcomes, but because they are more likely to outlive their implant. Implant type and surgical technique also play a role — which is why the experience of the surgeon and quality of implant positioning matter.

Mr Kosuge uses implants with well-established track records supported by NJR and international registry data, and focuses on precise positioning to optimise longevity.

What Is Revision Surgery?

If an implant eventually fails — through wear, loosening, or other reasons — revision surgery can replace the components. Revision surgery is more complex than primary replacement and recovery is typically longer. However, it is a well-established procedure with good outcomes in experienced hands, and should not be a reason to avoid a primary replacement that is clinically indicated.

How to Maximise the Life of Your Implant

Maintaining a healthy weight reduces load on the joint. Staying active through low-impact exercise — swimming, cycling, walking — maintains muscle support around the implant. Avoiding very high-impact activities such as running or contact sports is generally recommended after total joint replacement. Mr Kosuge will discuss your expectations and guid you during your consultations leading up to surgery.

The Bottom Line

For most patients today, a hip or knee replacement should be expected to last well into the 20-year range — and many implants perform well beyond that. The risk of needing a revision at some future point is usually outweighed by the years of improved function and freedom from pain that replacement provides.

To book an appointment with Mr Kosuge at The Rivers Hospital:

• Online booking

• Telephone: 01279 602675

Anxiety about the recovery period is one of the main reasons patients delay knee replacement surgery. The reality is that modern surgical techniques have changed what recovery looks like significantly — and for most patients, the progress within the first three months is far better than they anticipated. Here is a realistic guide to what the first 12 weeks involve.

Days 1 to 3: The Hospital Stay

The typical hospital stay following knee replacement is one to two nights. On the day of surgery, a physiotherapist will help you to stand and begin walking — usually within hours of the procedure. This is a very important part of recovery; early mobilisation is a core principle of modern joint replacement care. It reduces the risk of blood clots, prevents stiffness, and begins the process of restoring movement in the new joint.

Before you are discharged, the physiotherapy team will ensure you can safely get in and out of bed, manage stairs with a walking aid, and understand your home exercise programme. A follow-up plan will be confirmed before you leave.

Weeks 1 to 2: Home Recovery

Once home, the priority is keeping the knee moving while allowing the surrounding tissues to heal. A walking frame or crutches will be needed initially, and you will have specific guidance about what movements to avoid. Ice packs applied to the knee for 15 to 20 minutes several times a day are effective at managing swelling and discomfort.

Your home exercise programme at this stage will focus on regaining range of movement — particularly straightening the knee fully and bending it progressively. These exercises are not optional; the range of movement you establish in the first few weeks has a significant influence on your long-term outcome.

Weeks 3 to 6: Building Strength and Mobility

During this phase, most patients transition from a walking frame to a single crutch or walking stick. Swelling reduces gradually, and movement becomes noticeably easier. The goals are consistent daily walks, a reliable exercise routine, and continuing to increase the bend in the knee.

Most patients are advised not to drive for at least six weeks after knee replacement surgery — Mr Kosuge will confirm when it is safe for you, based on which leg was operated on and your individual recovery progress.

Weeks 6 to 12: Returning to Normal

By the six-week mark, many patients are walking without a walking aid and experiencing a marked reduction in pain compared to before surgery. Mr Kosuge reviews progress at the six-week post-operative appointment and advises on returning to activities including driving, swimming, and gentle recreational exercise.

By 12 weeks, the majority of patients are back to most normal daily activities. The knee continues to improve beyond this point — full recovery typically takes 12 months though.

What Helps Recovery Go Well

Preparation before surgery makes a meaningful difference. Being as physically active as possible beforehand, maintaining a healthy weight, and stopping smoking all contribute to a smoother recovery. Mr Kosuge provides personalised pre-operative guidance as part of your care pathway.

To book an appointment with Mr Kosuge at The Rivers Hospital:

• Online booking

• Telephone: 01279 602675