What is Total Knee Replacement?

No one's joints can escape the ravages of age. Wear and tear – if not a major injury – takes a toll on the cartilage of your knees with time.

At some point, it becomes impossible to avoid going 'under the knife', and that’s when going for a Total Knee Replacement surgery becomes a highly recommended option.

What is Total Knee Replacement?

Total Knee Replacement was first performed in the year 1968, and it remains one of the most important orthopaedic surgical advances of this century. Recent innovations in implant materials and advances in surgical techniques have made Total Knee Replacement Surgery a popular orthopaedic surgery across the globe.

The Total Knee Replacement surgical procedure involves replacing the degenerative knee joint with an artificial one.

As with any surgery, there are risks; but the success stories far outweigh the failures. Close to 40,000 successful Total Knee Replacement surgeries are performed annually in India and the numbers keep increasing every year.

Replacing Degenerative Joint with an Artificial One

Total Knee Replacement is the best option for people with severe osteoarthritis in the knee joint. Your worn out, damaged, overused and degenerative knee will be replaced with an artificial one through a minimally invasive surgery, using a small incision.

There are various types of Knee Prosthesis and the choice of the appropriate one is based on the condition of the Knee, age and lifestyle of the patient.

Knee Replacement in Bone Model

Femoral Component

Each type of Artificial Knee Joint is essentially made up of three parts:


The Femoral component (top portion) replaces the worn out cartilage of the Femur (Thigh Bone).

The Femoral components made of metal.

Tibial Component


The Tibial components usually made of two parts: a metal tray that is attached directly to the bone, and a plastic spacer that provides the slick surface.

The Tibial component (bottom portion) which consists of tibial base plate and tibial insert replaces the worn out cartilage of the tibia (Leg Bone).


The Patella Component (Kneecap portion) replaces the worn out cartilage of the Patella.

The Patellar components is made of plastic.

Depuy Sigma & Knee Implant

The prosthesis is held in place by a type of epoxy cement that attaches the metal to the bone.

Scientists, orthopaedic surgeons and implant manufacturers continuously strive to improve the durability of this prosthesis. Current innovations have resulted in the use of titanium and cobalt-chrome alloys, which are used for femoral and tibial implants, and low friction plastic component, made of ultra-high molecular weight polyethylene polymer, which acts as a spacer and articulating surface between two metal components.

All materials used in moving surfaces are very durable, but they will eventually wear out. This is as true in surfaces of artificial joint implants as in those of car tyres.

Benefits of undergoing Total Knee Replacement Surgery

  • Relieves you from excruciating knee pain
  • Helps you resume your normal lifestyle
  • Feels more or less like your natural knee