My daughter went to "Dr" Ong for a cleaning. He supposedly found several caries that desparately needed filling and he just happened to have the time right then. My wife is a dental hygientist so my daughter has had the best of care all her life. A review of xrays taken before the procedures by two other dentists didn't support "Dr" Ong's work. Xrays don't always show a cavity, but one that was as extreme as he said it was, most likey would show up on the film. He removed almost all of the tooth and now she has a lot of problems with it. She has suffered for quite some time with pain and discomfort. Flying has even been a problem. In the end the tooth will in all likelihood require a root canal and crown. So think twice about going to this guy. I would certainly question his ethics.