I thank Dr. Schaffhausen for the full use of both of my knees. Last year in April of 2014 I had my left knee replaced and today I have 100% use. This April of 2015 I had my right knee totally replaced and as of 06-17-2015 I had 100% total use. I am able to go up and down stairs very easily. I am able to bend, kneel, and walk long distances. I am so glad to have my life back. Thank you Dr. Schaffhausen for my new knees!