Understanding Knee Replacement Surgery: A Guide for Patients in Singapore

June 1, 2026 Brian Meyer

Knee pain can affect mobility, daily activities, and overall quality of life. For some individuals, symptoms may gradually worsen over time due to conditions affecting the knee joint. When conservative treatments no longer provide sufficient relief, a doctor may discuss whether knee replacement surgery could be considered as part of a treatment plan.

Knee replacement surgery is commonly associated with osteoarthritis, although other joint conditions and injuries may also contribute to joint damage. Understanding the procedure, recovery process, and considerations involved may help patients prepare for discussions with an orthopaedic doctor.

What Is Knee Replacement Surgery?

Knee replacement surgery, also known as knee arthroplasty, is a procedure where damaged portions of the knee joint are replaced with artificial components. The procedure is generally considered for individuals with significant knee joint damage that affects movement and daily function.

The knee joint contains cartilage that helps the bones move smoothly against one another. Over time, cartilage may wear down due to age-related degeneration, arthritis, or previous injuries. When this occurs, the bones may rub together, potentially causing pain, stiffness, and swelling

There are generally two types of knee replacement procedures:

Total Knee Replacement:
- A total knee replacement involves replacing the damaged surfaces of the knee joint with artificial implants.
Partial Knee Replacement :
- A partial knee replacement may be considered when damage affects only one section of the knee joint rather than the entire joint.

The type of procedure discussed depends on several factors, including the extent of joint damage, symptoms, and the patient’s overall condition.

Common Reasons Why Knee Replacement May Be Considered

Several conditions may contribute to knee joint damage and chronic pain:

Osteoarthritis

Osteoarthritis is one of the more common reasons patients seek medical assessment for ongoing knee pain. According to Singapore healthcare resources, osteoarthritis occurs when the cartilage in the joint gradually wears away over time. This may lead to stiffness, swelling, and reduced mobility.

Rheumatoid Arthritis

Rheumatoid arthritis is an inflammatory condition that may affect multiple joints, including the knees. Persistent inflammation can contribute to joint damage and discomfort.

Previous Knee Injuries

Past injuries involving fractures, ligament tears, or cartilage damage may increase the likelihood of joint problems later in life. Sports injuries and accidents can sometimes contribute to long-term wear within the knee joint.

Difficulty With Daily Activities

Some individuals may experience increasing difficulty with activities such as:

Walking for prolonged periods
Climbing stairs
Standing for extended durations
Getting in and out of chairs
Carrying out daily routines

When symptoms begin affecting mobility and quality of life, medical assessment may be recommended.

Symptoms That May Lead Someone to Seek Medical Advice

Knee symptoms can vary between individuals. Some common symptoms associated with knee joint degeneration include:

Persistent knee pain
Swelling around the knee joint
Joint stiffness, especially in the morning
Reduced range of movement
Difficulty walking
Knee instability
Pain during movement or at rest

Some patients may also experience discomfort that affects sleep or limits participation in regular activities.

Non-Surgical Treatments That May Be Considered First

Before discussing surgery, doctors may recommend conservative treatment options depending on the patient’s condition and severity of symptoms.

These may include:

Physiotherapy exercises
Weight management strategies
Medication prescribed by a doctor
Walking aids such as canes
Activity modification
Injections recommended by a healthcare professional

The suitability of these treatments varies between individuals. Surgery is generally considered after careful assessment and discussion between the patient and doctor.

What Happens Before Knee Replacement Surgery?

Preparation for knee replacement surgery typically involves several assessments and discussions.

Medical Evaluation

An orthopaedic doctor usually performs a physical examination and reviews the patient’s medical history, symptoms, and previous treatments.

Imaging and Diagnostic Tests

Imaging tests such as X-rays are commonly used to assess the condition of the knee joint. In some cases, additional imaging or blood tests may also be recommended.

Preparing for Surgery

Patients may receive instructions regarding:

Medication adjustments
Fasting before surgery
Rehabilitation planning
Arranging assistance during recovery at home

Understanding the recovery process beforehand may help patients prepare more comfortably for the post-operative period.

What Happens During Knee Replacement Surgery?

During the procedure, damaged portions of the knee joint are removed and replaced with artificial components designed to recreate the joint surface.

The surgery is performed under anaesthesia. The duration of the procedure may vary depending on the individual case and type of surgery being performed.

Following the procedure, patients are usually monitored in hospital before beginning rehabilitation and mobility exercises.

Recovery After Knee Replacement Surgery

Recovery timelines differ between individuals and may depend on several factors, including general health, rehabilitation progress, and the extent of surgery.

Hospital Stay

After surgery, healthcare teams monitor the patient’s condition and provide pain management support. Patients are often encouraged to begin gentle movement and walking exercises under supervision.

Physiotherapy and Rehabilitation

Physiotherapy is commonly included as part of recovery after knee replacement surgery. Rehabilitation exercises may help support mobility, flexibility, and muscle strength around the knee joint.

Patients are generally advised to follow rehabilitation plans and medical instructions throughout the recovery period.

Returning to Daily Activities

The timeline for resuming daily activities varies from person to person. Some individuals may gradually return to routine activities over several weeks or months based on medical advice and recovery progress.

Possible Risks and Considerations

As with many surgical procedures, knee replacement surgery carries potential risks and considerations. These may include:

Infection
Blood clots
Joint stiffness
Implant wear over time
Persistent discomfort
Need for additional procedures in some cases

Doctors typically discuss these considerations during consultation and informed consent discussions prior to surgery.

When Should Someone Consult an Orthopaedic Doctor?

Individuals experiencing ongoing knee pain or reduced mobility may consider seeking medical assessment if symptoms:

Persist despite conservative treatment
Affect daily activities
Limit walking or movement
Interfere with sleep or work
Cause instability or repeated falls

Early assessment may help identify the underlying cause of symptoms and allow appropriate management discussions.

Knee replacement surgery is one treatment option that may be discussed for individuals with significant knee joint damage and ongoing symptoms affecting daily life. Understanding the causes of knee pain, available treatment options, and the recovery process may help patients make informed decisions during consultations with an orthopaedic doctor.

Patients experiencing persistent knee discomfort or mobility concerns are encouraged to seek professional medical advice for individual assessment and treatment recommendations.