 I am Dr. V.G Rajan. I am a consultant orthopedic surgeon practicing in Manipal Hospital, Bangalore. Today I will be talking to you about joint replacement surgery and the secret to its success. Joint replacement surgery is the most successful and widely performed surgery worldwide. Sadly, failures do exist in the form of persistent pain and limited function even after surgery. Unfortunately, the failure rate may be slightly higher in our country due to two main reasons. First reason, due to lack of awareness among general public regarding knee replacement surgery, which leads to delayed presentation or seeking surgery. As a result, there is more complex deformities which results in more complications. Hence, the outcomes are either not very good or it is poor. Second reason is poor patient selection for surgery. To elaborate, an ideal person who needs joint replacement surgery should have tried all non-operative treatment and should have failed and should be currently having three main entities. First one being night pain, basically pain even while taking sleeping. Rest pain, which means a patient should have pain even while sitting or taking rest. And lastly, very limited pain-free walking distance which restricts to about 100 yards or less. Hence, both these factors play a very important role in deciding the success following joint replacement surgery.