The most common joint replacements are knee and hip replacements.
The main reasons for knee replacement are rheumatoid arthritis, knee injury, haemophilia, unusual bone growth, loss of cartilage, knee deformity, etc.
The major types of joint replacement are Total Joint Replacement Surgery, Hip Replacement Surgery and Knee Replacement Surgery.
The average recovery time for knee replacement is around six months. It might take longer to resume physically demanding activities.
It is highly unlikely to have pain after 3 months of knee replacement. If you do, you should consult your surgeon.
There is no actual time limit for hip replacement. There might be risk factors which you need to discuss with your surgeon.
You should get hip replacement if, pain doesn't go away with medicines and/or Range of motion is compromised.
The normal recovery time from hip operation is 2-3 months. You need to consult your surgeon to know when you can resume heavy physical activities.