Understanding Knee Replacement Surgery: A Patient's Guide

What is knee replacement?

Knee replacement surgery is a highly effective procedure designed to relieve pain and restore function in severely damaged knee joints. Often recommended when conservative treatments like medication, physiotherapy, or injections have failed, knee replacement involves removing the damaged parts of the knee and replacing them with artificial components, known as prostheses.

Common conditions leading to knee replacement include osteoarthritis, the most prevalent cause, along with rheumatoid arthritis, injury-related damage, and degenerative joint diseases. For many patients, knee replacement significantly improves mobility, reduces chronic pain, and enhances overall quality of life.

Types of knee replacement procedures

Total Knee Replacement (TKR)

Total Knee Replacement is the most commonly performed procedure, where the entire knee joint surface is replaced. Around 35% of TKRs in Australia can be attributed to overweight or obesity, highlighting a key modifiable risk factor. This surgery is recommended for patients experiencing widespread joint damage resulting in severe pain, stiffness, and loss of function.

Key benefits of TKR include pain relief, improved joint stability, and restoration of movement. Patients typically report better quality of life post-surgery, with many returning to low-impact physical activities.

Partial Knee Replacement (PKR)

Partial Knee Replacement is suitable for patients whose damage is confined to one compartment of the knee. This less invasive option preserves healthy knee compartments and can lead to a quicker recovery and more natural-feeling knee movement.

Unlike TKR, PKR conserves more of the natural bone and ligaments, which might be preferable for younger, active patients. However, it's only appropriate when the damage has not spread extensively.

The knee replacement surgery process

Preparing for knee replacement

Before surgery, patients undergo a thorough pre-operative assessment to ensure fitness for the procedure. This includes reviewing medical history, physical examinations, and necessary tests such as blood tests and ECGs. Any medications may be adjusted to reduce risks during surgery.

Joint Vision emphasises preparing your home environment ahead of time by removing trip hazards and organising support to smooth your recovery at home.

The day of surgery

On admission, patients are guided through the process, including anaesthesia options such as general or regional anaesthesia. The surgical team explains what to expect to alleviate nerves and ensure comfort.

The surgical steps

• A precise incision is made to access the joint.
• Damaged cartilage and bone are removed.
• The prosthesis is fitted, typically composed of metal and durable plastic components designed to replicate natural knee movement.

The operation usually lasts between one to two hours.

Recovery and rehabilitation

Immediate post-operative care

Pain management is pivotal, using medications and ice therapy. Early mobilisation is encouraged, with physiotherapists guiding gentle exercises to regain strength and range of motion.

At Joint Vision, a multidisciplinary team including orthopaedic surgeons, specialised physiotherapists, and nursing staff ensures comprehensive care from day one, reducing risks such as blood clots or infection.

The road to recovery

Typically, hospital stays range from 2 to 4 days. Upon returning home, ongoing physiotherapy and exercise programs tailored by exercise physiologists support healing. Patients can anticipate milestones such as walking with minimal support within weeks and gradually increasing activity levels over months.

Long-term recovery

Returning to work and everyday activities varies but usually occurs within 6 to 12 weeks, depending on occupation and recovery speed. Patients receive guidance on protecting their new knee, avoiding high-impact activities, and recognising signs of complications early.

Risks and potential complications

As with all surgeries, risks may include infection, blood clots, and prosthesis-related issues such as loosening or wear over time. Open communication with your orthopaedic surgeon and adherence to post-operative instructions greatly minimise these risks.

Benefits of knee replacement surgery

• Pain relief and improved mobility: Relief from chronic knee pain and stiffness.
• Enhanced quality of life: Ability to return to activities like walking, swimming, and gardening.
• Durability: Modern prostheses last on average 15–20 years, after which revision surgery may be considered.

How Joint Vision supports your knee replacement journey

Patients benefit from a multidisciplinary approach where orthopaedic surgeons collaborate closely with physiotherapists, exercise physiologists, and a dedicated nursing team. Our on-site diagnostic imaging facilitates accurate pre-surgical assessment and timely follow-up.

We also offer access to injection and orthobiologic therapies, personalised rehabilitation programmes, and WorkCover rehabilitation for patients recovering from work-related injuries.

Frequently asked questions

How do I know if I need a knee replacement?

If you experience persistent knee pain affecting daily function despite conservative treatment, a consultation with an orthopaedic specialist is recommended.

Will the new knee set off airport security?

No, modern knee prostheses do not trigger airport metal detectors.

When can I drive again?

Typically, after 6 weeks, you can operate the vehicle safely without pain or restricted movement.

How long will the joint last?

Prosthetic knees generally last 15–20 years but vary with activity levels and patient factors.

What activities can I do after recovery?

Low-impact exercises such as cycling, swimming, and walking are encouraged; contact sports are usually discouraged.