When I speak with patients in Dhaka about total knee replacement surgery, I find that most of them are not only asking about the operation itself. They want to know whether the pain has become serious enough for surgery, whether they are too young or too old, how much walking they will be able to do afterwards, how long recovery will take, and whether the new knee will really help them return to daily life with more confidence. These are the right questions to ask.

Total knee replacement surgery, also called total knee arthroplasty, is a procedure in which the damaged surfaces of the knee joint are replaced with artificial components so that the joint can move with less pain and better function.[1][2] In my practice, I usually recommend this procedure only after careful evaluation, because it is a major decision and it works best when the patient selection is appropriate.

This article explains what total knee replacement surgery means, who may benefit from it, what recovery usually involves, and what Bangladeshi patients should realistically expect before making a decision.

What total knee replacement surgery actually means

Total knee replacement surgery is done when the knee joint has become severely damaged, most commonly from osteoarthritis, inflammatory arthritis, or long-term post-traumatic wear. During the surgery, the damaged cartilage and a small amount of bone are removed from the knee surfaces, and metal and plastic components are positioned to recreate smoother joint movement.[1][2]

In a total knee replacement, the surgeon typically resurfaces:

• the lower end of the thigh bone
• the upper end of the shin bone
• the back of the kneecap in selected cases, depending on the surgical plan

The aim is not to give you a completely normal natural knee again. I usually explain to my patients that the goal is a more reliable, less painful, more functional knee that helps with walking, standing, stairs, and daily routine.[1]

When I start thinking seriously about total knee replacement

Not every patient with knee pain needs knee replacement. In fact, many people improve for a long time with weight control, medicine, physiotherapy, activity modification, bracing, and selected injections. I think more seriously about total knee replacement when several problems are present together.[1][3]

Common reasons surgery may be considered

Patients who may benefit often have:

• severe knee pain or stiffness that limits walking, stairs, or getting up from a chair
• pain even during rest or at night
• chronic swelling and inflammation that does not improve enough with non-surgical care
• bowing or deformity around the knee
• major loss of function affecting work, prayer, sleep, or mobility inside and outside the home[1]

One important point I want Bangladeshi patients to understand is that the decision should be based mainly on pain, disability, joint damage, and failure of conservative treatment, not only on age. Some patients delay too long because they think surgery is only for a certain age group. Others ask for surgery too early before they have completed a proper non-surgical treatment plan. Both mistakes can lead to poor timing.[1][4]

Who is a good candidate for this surgery?

When I evaluate a patient for total knee replacement surgery, I look at several factors together rather than focusing on X-rays alone.

Pain and daily disability

If the patient has severe symptoms that clearly interfere with daily activities for months despite appropriate treatment, surgery may become reasonable. The joint may hurt during walking, stair climbing, prayer movements, standing from a chair, or even resting at night.[1][4]

Imaging evidence

X-rays are very important. They help show narrowing of the joint space, deformity, bone changes, and the severity of arthritis. In many cases, X-rays confirm that the cartilage loss is advanced enough for replacement to be considered.[1]

Failure of non-surgical treatment

Before surgery, I expect a patient to have tried appropriate non-surgical treatment unless there is a very unusual reason not to. This may include:

• doctor-guided pain management
• physiotherapy and strengthening
• weight reduction where relevant
• walking support or bracing
• activity changes
• selected injections in appropriate cases

Consensus criteria in the literature also support surgery after sustained pain, structural damage, quality-of-life impairment, and inadequate response to conservative management.[4]

Overall health and recovery ability

The surgery may help the knee, but the body still has to tolerate anesthesia, wound healing, rehabilitation, and the early postoperative period. Diabetes, heart disease, kidney disease, smoking, obesity, recurrent infections, and untreated dental or urinary problems may affect surgical risk and preparation.[1][5]

Conditions that commonly lead to total knee replacement

The most common reason is osteoarthritis of the knee. This is the gradual wearing away of cartilage that leads to pain, stiffness, swelling, and reduced movement over time.[3]

Other conditions that may eventually require total knee replacement include:

• inflammatory arthritis
• post-traumatic arthritis after old injury
• knee damage from deformity or abnormal alignment
• selected cases of osteonecrosis or severe joint destruction[2][4]

In Dhaka, I often see patients who have lived with arthritis symptoms for years and gradually changed their lifestyle around the knee. They reduce walking, avoid stairs, sit less on the floor, shorten outings, and stop certain work responsibilities. When these changes become severe, the conversation about replacement becomes more relevant.

What happens before the operation

Preparation is one of the most important parts of successful total knee replacement surgery. I usually tell patients that good surgery begins before the day of surgery.

Medical assessment

A full medical evaluation is usually needed before the operation. Blood tests, urine tests, and heart assessment may be required, depending on age and medical history.[1]

Infection risk reduction

Major dental infections and some urinary problems should be addressed before surgery because bacteria reaching the bloodstream can increase the risk of joint infection.[1] This is especially important for patients who have ignored chronic dental disease or recurrent urinary symptoms.

Home and family planning

Many Bangladeshi patients recover at home with support from family members. Before surgery, it helps to plan for:

• safe toilet access
• hand support on stairs
• a firm chair with arms
• temporary use of a walker or cane
• help with shopping, bathing, dressing, and cooking during the early weeks[1][5]

This practical planning matters more than many people expect.

What happens during total knee replacement surgery

The operation usually takes around one to two hours, though exact timing varies. Damaged cartilage and bone are removed from the joint surfaces, and the new components are placed to restore alignment and function.[1]

Patients may receive general anesthesia or regional techniques such as spinal anesthesia or nerve block, depending on the anesthesia plan and individual condition.[1]