In a press conference organised in Mandi, Dr Ramesh K Sen, Director, Orthopaedics & Joint Replacement, stated that the success of primary Total Knee Replacement (Knee Arthroplasty) in most patients is strongly supported by more than 20 years of follow-up data around the world. Sharing results of data analysis of his patients done by him and his team, he said that there appears to be rapid and substantial improvement in the patients’ pain, ability to work and overall quality of life in about 90% of them.