My husband and I spent 9 thousand dollar on 7 crowns. All of mine had to be re-done because they were seated improperly. It was painful during the treatment and even more so after.All three of my husbands permanent crowns popped off after 2 months. Although we were referred by our HMO nothing Claire Cho did was covered. Now I'm in pain and debt I have to have 2 root canals as a result of her poor work!