Why Ruby is thought to be the best knee replacement hospital in Kolkata Ruby is a super-specialty clinic in Kolkata that provides excellent, evidence-based care for a variety of sports injuries and orthopaedic ailments. We combines expertise in clinical research, academia, and patient care to provide patients with the most specialized care available. The Department of Orthopaedic Surgery is a multispecialty group of professionals who genuinely care about their patients, researchers, and surgeons. In Kolkata, Ruby is recognized as the top knee replacement hospital. #kneereplacementhospitalinKolkata