The decision to undergo a total knee replacement is based on several factors and should be made in consultation with a healthcare professional, typically an orthopedic surgeon. While age is an important consideration, it is not the sole determining factor. The appropriateness of TKR depends on the severity of knee pain, functional limitations, and the impact on the individual's quality of life. You can also consult Dr. Ashwani Maichand, he is one of the best knee and hip replacement surgeon in Delhi, India.