Five knee replacement surgeries:

1. Total knee replacement
2. Partial knee replacement
3. Patellofemoral replacement
4. Complex (or revision) knee replacement
5. Cartilage restoration. Depending on the knee condition or disability, an orthopedic surgeon may recommend one of these

Four knee replacement surgery steps:

1. Preparing the bone
2. Positioning the metal implants
3. Resurfacing the patella
4. Inserting the spacer. During the procedure, metal and plastic parts are used to cap the ends of the bones ( those that connect the knee joint, along with the kneecap)

Osteoarthritis is an age-related condition commonly occurring when cartilage (the cushion between the knee and the bone joints) breaks down. Osteoarthritis is the main reason why people go for knee replacement surgery. Apart from this, rheumatoid arthritis that results in injuries, fractures, torn cartilages, torn ligaments, and deformities such as bowed legs or knock-knees are all conditions that may require knee replacement surgery.