Knee pain is something many people ignore at first. A little stiffness in the morning. A slight discomfort while climbing stairs.
But over time, that mild pain can slowly turn into something that affects every step you take.
Before we understand when a knee replacement is needed, let’s first understand what exactly happens inside the knee in arthritis.
Understanding the Knee Joint
Our knee joint is made up of three main bones:
- The femur (thigh bone)
- The tibia (shin bone)
- The patella (kneecap)
At the ends of these bones is a smooth, slippery layer called articular cartilage. This cartilage acts like a cushion.
It allows the bones to glide over each other smoothly when we walk, sit, stand, or climb stairs.
What Happens in Knee Arthritis?
In knee arthritis, this articular cartilage slowly starts to wear away. As the cartilage thins out, the bone underneath gets exposed.
When this happens, the bones begin to rub against each other. And that is when pain begins.
At first, the pain may only appear during activity. Getting up from a chair becomes uncomfortable. Squatting becomes difficult. Climbing stairs starts to hurt.
As arthritis progresses:
- Pain becomes more frequent
- Movements become more restricted
- Swelling may develop
- Pain may even occur at rest
In advanced stages, deformities can develop. Some patients may develop bow legs (genu varum) or knock knees (genu valgum). In many cases, both knees are affected.
When Should You Consider Surgery?
Many patients ask, “How do I know it’s time for knee replacement?”
The answer is not based on age alone. It is based on how much arthritis is affecting your daily life.
In the early stages, we always begin with conservative treatment:
- Pain medications
- Anti-inflammatory medicines
- Chondroprotective agents
- Physiotherapy and strengthening exercises
- Lifestyle modifications such as weight management
If these measures provide relief, surgery is not required.
However, if despite all conservative treatment:
- Pain is severe and persistent
- You are unable to perform daily activities
- You cannot walk comfortably
- Pain disturbs your sleep
- Deformity is progressing
Then it may be time to consider knee replacement.
The “right time” for surgery is when arthritis has entered the disability phase — when pain and stiffness significantly limit your quality of life.
What Is Done in Knee Replacement Surgery?
In knee replacement surgery, the damaged cartilage is carefully removed from the femur and tibia.
The worn-out surfaces are then replaced with specially designed implants:
- A metal component is placed over the femur
- A metal component is placed over the tibia
- A plastic insert (polyethylene) is placed between them
This creates a smooth new surface so the bones no longer rub against each other. As a result, patients experience significant pain relief and improved mobility.
Partial vs. Total Knee Replacement
Not every patient needs a total knee replacement.
If arthritis affects only one compartment of the knee (most commonly the inner or medial compartment), a partial knee replacement may be sufficient. In this procedure, only the damaged portion is replaced.
If all three compartments of the knee femur, tibia, and patella are involved, then a total knee replacement is recommended.
Moving Forward with Confidence
Knee replacement surgery is one of the most successful procedures in orthopedics. When performed at the right time, it can dramatically improve quality of life.
The goal is not just to reduce pain but to restore independence, mobility, and confidence in daily activities.
If knee pain is limiting your life despite proper medical treatment, it may be time to consult an orthopedic specialist and evaluate your options.
This blog post has been published for patient information purposes.
For more information or to schedule a consultation, please contact our Orthopedic Department.
For more information, contact us 02240763000/ 7028859555.
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