Living with persistent knee pain is exhausting. For many people in Perth, even simple movements like getting out of a chair or walking across the room can be difficult. When arthritis affects only part of the knee, a partial knee replacement may be the solution.

This guide explains everything you need to know about the surgery, recovery, and long-term outcomes—so you can make an informed decision.

What Is a Partial Knee Replacement?

Partial knee replacement, also called unicompartmental knee replacement, involves replacing only the damaged part of the knee joint.

Unlike total knee replacement, this procedure preserves the healthy areas of the knee. That means:

• A smaller incision.
  
  

• Less bone removal.
  
  

• Faster recovery.
  
  

• A more natural feel after healing.
  
  

Who Is Suitable for Partial Knee Replacement?

Not everyone with knee pain qualifies for this procedure. Candidates are carefully assessed before surgery.

Common Requirements

• Arthritis is limited to one compartment of the knee.
  
  

• Strong ligaments and a stable knee structure.
  
  

• No major deformities in alignment.
  
  

• Reasonable activity level with realistic expectations.
  
  

Success Rates

Research shows that over 90% of patients report major pain relief within the first year (Journal of Arthroplasty, 2021).

Benefits of Partial Knee Replacement

Patients often choose partial replacement because of the advantages it offers over total replacement.

• Smaller incision and less invasive surgery.
  
  

• Shorter hospital stay (often 1–3 days).
  
  

• Faster recovery—walking without aids in a few weeks.
  
  

• More natural movement due to preserved ligaments.
  
  

• Long-term durability with implants lasting 15–20 years.
  
  

Preparing for Surgery in Perth

Good preparation helps improve recovery outcomes.

Pre-Surgery Assessments

Your surgeon will order X-rays or MRI scans to confirm the extent of arthritis. You may also need blood tests and a health check.

Prehabilitation

Strengthening muscles before surgery makes recovery easier. Studies show that pre-surgery physiotherapy can shorten recovery by 20–30%.

Lifestyle Adjustments

• Stop smoking if possible.
  
  

• Maintain a healthy weight.
  
  

• Prepare your home for easier mobility post-surgery.
  
  

The Surgery: Step by Step

Partial knee replacement is usually completed in about 1–1.5 hours.

What Happens During Surgery

1. Anaesthesia is given—either spinal or general.
   
   

2. A small incision is made over the knee.
   
   

3. Damaged cartilage and bone are removed.
   
   

4. A metal and plastic implant is fitted.
   
   

5. The incision is closed and bandaged.
   
   

Risks to Consider

Like all surgeries, there are risks. These include infection, blood clots, or implant loosening. However, complication rates remain low, and success rates are around 90–95% at 10 years (Australian Orthopaedic Association Registry, 2023).

Recovery After Surgery

Recovery varies, but most patients in Perth experience a clear timeline.

Hospital Stay

• Usually 1–3 days.
  
  

• Some clinics offer same-day discharge for suitable patients.
  
  

First 2 Weeks

• Walking with assistance begins almost immediately.
  
  

• Swelling and pain are managed with medication and ice.
  
  

• Physiotherapy starts early.
  
  

Weeks 2–6

• Walking aids are phased out.
  
  

• Daily tasks become easier.
  
  

• Driving is possible after about 4 weeks.
  
  

Beyond 6 Weeks

• Low-impact activities like cycling, swimming, and golf can resume.
  
  

• Most patients feel near normal within 3–4 months.
  
  

Long-Term Results

Partial knee replacements last a long time.

• 80–85% of implants still function well at 20 years (British Journal of Bone and Joint Surgery, 2020).
  
  

• Patients often regain 10–15% more natural knee function compared to total knee replacements.
  
  

Activities After Surgery

Safe Activities

• Walking, swimming, cycling.
  
  

• Gardening and light sports.
  
  

• Golf and hiking.
  
  

Activities to Avoid

• High-impact running.
  
  

• Contact sports.
  
  

• Heavy lifting.
  
  

Choosing the Right Surgeon in Perth

Surgical skill is a key factor in success. An experienced surgeon ensures accurate implant positioning and better long-term results.

If you’re considering this procedure, consulting a trusted orthopaedic surgeon Perth can help you receive advanced surgical care and a tailored recovery plan.

Key Statistics to Remember

• 60,000+ knee replacements are performed in Australia every year.
  
  

• 10–15% are partial replacements.
  
  

• Patients with partial replacements typically experience shorter recovery times and higher satisfaction rates compared to those with total replacements.
  
  

Final Thoughts

Partial knee replacement offers a balance between effective pain relief and preserving natural knee function. It is less invasive than a total replacement, with faster recovery and excellent long-term results.

If arthritis is affecting only part of your knee, partial replacement could give you back the mobility and comfort you’ve been missing. Consult with a qualified surgeon in Perth to determine if this option is suitable for you.