Knee osteoarthritis is the most common form of osteoarthritis. In the first stage, symptoms are mild, but by the fourth, a person may need surgery.

Osteoarthritis (OA) of the knee affects the bones, the cartilage, and the synovium in the knee joint.

Cartilage is a slippery tissue that provides a smooth surface for joint motion and acts as a cushion between the bones.

Synovium is soft, and it lines the joints. It produces fluid, called synovial fluid, for lubrication, and it supplies nutrients and oxygen to the cartilage.

As these functions break down, they no longer protect the bones of the knee joint, and bone damage occurs.

Knee replacement surgery, also known as knee arthroplasty. It can help relieve pain and restore function in severely diseased knee joints. The procedure involves cutting away damaged bone and cartilage from your knee joint and replacing it with an artificial joint (prosthesis) made of metal alloys, high-grade plastics and polymers.

• Although osteoarthritis generally involves both knees, the damage can vary. If both knees are severely damaged by arthritis or injury and no relief with medicine and physiotherapy, then your doctor may recommend Bilateral Knee replacement.
• Knee replacement surgery is a very effective procedure in term of pain reduction, enhances mobility and is relatively safe in terms of complications and mortality, making it one of the most successful and frequently performed procedures in orthopedics.