Orthopedic Doctor in Dombivli Knee Replacement Surgery (Arthroplasty) involves replacing a damaged, worn or diseased knee with an artificial joint or a prostheses. It is quite a common surgery done for knee pain in patients with arthritis. For most people, a replaced knee lasts for atleast 15 to 20 years, especially if the new knee is cared for properly and not put under too much strain.