Bilateral Total Knee Replacement Surgery
Relieving pain and restoring function when both knees are affected
If you’re experiencing severe arthritis or joint damage in both knees, you may benefit from bilateral total knee replacement surgery. This procedure involves replacing both knee joints with prosthetic implants, either during the same operation or as two separate surgeries. While not suitable for everyone, bilateral knee replacement can be an effective option for patients with advanced disease affecting both knees, helping to reduce pain, improve stability, and restore mobility.
Topics covered on this page:
- What bilateral knee replacement involves
- When it might be recommended
- The difference between simultaneous and staged procedures
- Surgical techniques and advanced technology used
- What recovery looks like if you have both knees replaced
- Risks, considerations, and expected outcomes
- How we support you with personalised planning and the POP app
- Whether this surgery may be right for you
What bilateral total knee replacement involves
Bilateral total knee replacement is a procedure in which both knee joints are replaced with prosthetic components. This involves removing damaged cartilage and bone from the ends of the femur (thigh bone), tibia (shin bone), and, in some cases, the underside of the kneecap (patella), before inserting precision-engineered implants.
The aim of bilateral knee replacement is to restore smoother joint movement on both sides, improve alignment, and reduce pain caused by advanced arthritis or joint degeneration. The procedure may be performed either as a simultaneous operation or as staged surgeries.
When it might be recommended
Bilateral total knee replacement may be recommended if:
- Both knees are significantly affected by osteoarthritis or joint damage
- You experience ongoing pain in both knees that limits walking, standing, or sleep
- Imaging (X-rays, MRI, or CT scans) confirms advanced degeneration in both joints
- Non-surgical treatments such as medications, physiotherapy, bracing, or injections no longer provide adequate relief
Your age, general health, muscle strength, and functional goals are all carefully considered before recommending bilateral surgery. The decision to replace one or both knees is made collaboratively with your surgeon
The difference between simultaneous and staged procedures
Simultaneous bilateral knee replacement: This approach involves replacing both knees during the same operation under one anaesthetic. It may be considered for patients who are medically fit and able to tolerate a longer procedure.
Potential advantages include:
- One hospital admission
- A single anaesthetic
- One overall rehabilitation period
However, early recovery can be more demanding, as both knees are healing at the same time.
Staged bilateral knee replacement: Staged surgery involves replacing one knee first, followed by the second knee at a later date, usually weeks or months apart. This approach allows you to recover from the first surgery before undergoing the second.
Staged procedures may be preferred if:
- There are medical factors that increase surgical risk
- A more gradual recovery is appropriate
- One knee is more symptomatic than the other
Your surgeon will recommend the most suitable approach based on your overall health, knee condition, and recovery goals.
Surgical techniques and advanced technology used
At Melbourne Orthopaedic Clinic, bilateral total knee replacement surgery is performed using detailed pre-operative planning and modern surgical techniques designed to support accuracy and consistency.
Advanced tools may include:
- 3D imaging and digital planning to assess alignment, bone anatomy, and implant positioning
- Patient-specific instrumentation or computer-assisted techniques to support accurate bone preparation
- Intraoperative assessment tools to help optimise knee balance and joint mechanics
The same precision-based approach is applied whether your knees are replaced simultaneously or in a staged manner.
What recovery looks like if you have both knees replaced
Recovery following bilateral knee replacement varies depending on whether surgery is simultaneous or staged.
If done simultaneously:
- Hospital stay may be slightly longer, typically around 4–6 days depending on progress
- Physiotherapy usually begins on the day of or day after surgery
- Walking aids such as a frame or crutches are commonly required initially
- Additional support at home is often needed during the early recovery period
If staged:
- Recovery occurs over two separate periods
- Many patients find the second recovery more manageable, as they are familiar with the rehabilitation process
Rehabilitation focuses on restoring knee movement, strength, and walking ability through a structured physiotherapy program.
Risks, considerations, and expected outcomes
Bilateral total knee replacement is widely performed and generally effective, but it does involve important considerations.
Potential risks include:
- Increased physical demands during early recovery
- Longer anaesthetic time or higher blood loss, particularly with simultaneous surgery
- Temporary fatigue or reduced energy levels post-operatively
- Standard surgical risks such as infection, blood clots, stiffness, or implant-related complications
Expected outcomes:
- Reduction in knee pain on both sides
- Improved walking ability, balance, and confidence
- Better alignment and joint stability
- Improved overall quality of life for patients with severe bilateral knee disease
Your surgeon will discuss risks and benefits in detail during your consultation.
How we support you with personalised planning and the POP app
Every bilateral knee replacement at Melbourne Orthopaedic Clinic is guided by a customised pre-operative plan and digital tools to support your surgical journey. You’ll receive access to the Patient Optimized Pathway (POP) app, a user-friendly mobile platform that:
- Guides you through pre-operative preparation and recovery
- Provides reminders, education, and rehabilitation exercises
- Allows your surgical team to track progress and offer timely support
- Keeps your family or support network informed and involved
With the POP app and your dedicated care team, you’ll have ongoing guidance from the day you decide to undergo surgery through to full recovery.
Whether this surgery may be right for you
Bilateral total knee replacement may be suitable if:
- Both knees are affected by advanced arthritis
- You are motivated to participate in rehabilitation
- You are medically fit for either a simultaneous or staged procedure
- You are seeking long-term relief from pain and functional limitation in both knees
During your consultation, your surgeon will assess your knee health, general fitness, and expectations to help determine whether bilateral knee replacement is an appropriate option for you.