Knee Replacement Surgery

Knee replacement surgery, clinically referred to as knee arthroplasty, is a proven orthopaedic procedure in which the damaged surfaces of a deteriorated knee joint are replaced with a precision-engineered prosthetic implant. With a success rate exceeding 95% at our partner institutions worldwide, it is one of the most performed and well-validated joint surgeries in modern medicine.

Understanding Knee Replacement Surgery

First performed in 1968, knee replacement surgery has evolved into a highly refined procedure that replaces worn or damaged knee structures with artificial implants designed to closely replicate natural joint mechanics. The goal is not to cure the underlying condition such as arthritis, but to restore pain-free movement and functional stability to the joint.

Surgery is recommended only after all conservative, non-surgical approaches have been exhausted. Two principal forms of the procedure exist:

• Total Knee Replacement: both compartments of the joint are fully resurfaced.
• Partial Knee Replacement: only the affected compartment is addressed, preserving healthy bone and ligament structure.

The Anatomy of the Knee

The knee is the body's largest and most complex joint, bearing the greatest mechanical load of any structure in the musculoskeletal system. It comprises the femur (thigh bone) and tibia (shin bone), supported by the fibula and patella (kneecap). Ligaments provide structural stability, tendons connect surrounding musculature, and the meniscus acts as a shock-absorbing cushion between the joint surfaces.

Conditions That Lead to Knee Replacement

Knee degeneration most commonly arises from arthritic conditions. The three primary types that may necessitate surgical intervention are:

Osteoarthritis

The most prevalent cause. Age-related cartilage erosion, typically affecting individuals over 50, causes bones to grind directly against one another, producing significant pain and stiffness.

Rheumatoid Arthritis

An autoimmune inflammatory condition in which the synovial membrane surrounding the joint becomes chronically inflamed and thickened, progressively destroying the cartilage.

Post-Traumatic Arthritis

Arthritis that develops following a knee injury or fracture. Over time, damage to the cartilage accelerates joint deterioration, often requiring surgical management.

Before recommending surgery, specialists typically explore a range of non-surgical options, including:

• Pain and anti-inflammatory medications
• Physiotherapy and assistive mobility devices
• Corticosteroid injections
• Viscosupplementation

Who Is a Candidate for Knee Replacement?

Surgical candidacy is evaluated on an individual basis. Patients typically considered for knee replacement include those who:

• Present with severe, debilitating knee joint damage
• Have not responded adequately to non-surgical treatments, including physiotherapy and medication
• Suffer from advanced osteoarthritis significantly limiting daily function

Pre-Operative Assessment

Your specialist will recommend a series of investigations prior to surgery to ensure optimal preparation. These typically include routine blood panels, weight-bearing X-rays, and MRI imaging where clinically indicated. Additional specialised tests may be requested based on individual health profiles.

The Surgical Procedure

The procedure is performed under general anaesthesia and typically takes two to three hours. A urinary catheter is placed, and continuous monitoring of cardiac and haemodynamic parameters is maintained throughout.

The surgeon makes a carefully planned incision over the knee, longer for a total replacement and shorter for a partial, and methodically removes the damaged joint surfaces. A prosthetic implant, engineered from medical-grade metal and high-density plastic, is then positioned to replicate the natural anatomy of the joint. The prosthesis consists of three precisely fitted components: the femoral, tibial, and patellar elements. The incision is closed with sutures and the site dressed with sterile bandages.

Post-Operative Care

Following surgery, patients are transferred to a monitored recovery suite where vital signs are closely observed. Pain management is administered proactively through analgesic and anti-inflammatory medications.

Knee replacement requires a minimum hospital stay of three to four days. From the first post-operative day, a physiotherapist will guide the patient through initial mobility, typically using crutches, and introduce a structured rehabilitation programme. A Continuous Passive Motion (CPM) device is often used during the inpatient period to keep the joint moving gently, reducing stiffness and accelerating recovery.

Recovery and Rehabilitation

Upon discharge, patients receive a detailed recovery plan. Key guidelines include:

• Keeping the surgical wound clean and dry at all times
• Elevating the operated limb when resting
• Applying ice packs intermittently to manage swelling and discomfort
• Avoiding strenuous activity or excessive weight-bearing on the operated leg
• Attending all prescribed physiotherapy sessions without interruption

Full recovery typically spans approximately three months, though this varies depending on the patient's age, general health, muscle condition, and the extent of pre-operative joint deterioration.

Types of Knee Replacement Surgery

Total Knee Replacement (TKR)

The most widely performed procedure, replacing the entire knee joint with a tri-component prosthesis comprising femoral, tibial, and patellar elements.

Partial (Unicompartmental) Knee Replacement (PKR)

Suitable when degeneration is confined to a single compartment. This approach preserves more natural bone and ligament structure, often resulting in a shorter recovery and more natural post-operative movement.

Robotic-Assisted Knee Replacement

An advanced technique that integrates the precision of robotic guidance systems with the expertise of a fellowship-trained orthopaedic surgeon, enhancing implant alignment and reproducibility of outcomes.

Bilateral Knee Replacement

The simultaneous replacement of both knees in a single surgical episode. Appropriate for patients with significant bilateral degeneration, this approach reduces total recovery time and allows for concurrent rehabilitation of both joints.

Revision (Complex) Knee Replacement

Performed when a prior knee replacement requires correction due to implant failure, loosening, instability, or infection. Specialised implants and advanced surgical techniques are employed to address complications such as bone loss or ligamentous compromise.

Potential Risks and Considerations

As with any major surgical procedure, knee replacement carries a defined set of risks that your surgeon will discuss comprehensively during the pre-operative consultation

Infection

Superficial or deep infections at or around the surgical site may occur. These are typically managed with targeted antibiotics; however, deep prosthetic infection may require further surgical intervention.

Deep Vein Thrombosis (DVT)

Reduced mobility increases the risk of blood clot formation. Adherence to post-operative movement and physiotherapy protocols significantly mitigates this risk. In rare cases, clots may migrate to the lungs or heart.

Prosthetic Complications

Implant loosening or mechanical failure can occur either early or years post-surgery, and may necessitate a revision procedure.

Neurovascular Injury

Incidental nerve contact during surgery may result in temporary or persistent sensory changes. Physiotherapy is typically prescribed to assist recovery in such cases.

Falls prevention is critical in the early recovery period. A safe home environment, including raised toilet seating, non-slip flooring, minimal stair use, and the provision of appropriate mobility aids, greatly reduces the risk of further injury.

How GHO Supports Your Journey

Global Health Opulence connects you with world-class orthopaedic specialists and internationally accredited hospitals across leading medical destinations including India, Turkey, Thailand, Germany, and beyond. Our concierge team manages every aspect of your medical journey, from initial consultation and specialist matching, to visa facilitation, travel logistics, premium accommodation, and post-treatment virtual follow-up. Every step is handled with the care, precision, and discretion you deserve.

Frequently Asked Questions