My wife is Japanese and in Japan. Japanese dentists don't give you copies of X-rays. She has had something like 6 months of treatment and now has tooth pain. She wasn't happy about the professionalism of her previous dentist- didn't give her information about making choices and rushed contact. She was concerned about white dots on her gums- that was root bacterial contamination. Her current dentist confirmed what I told her that it wasn't a problem. Anyway because of the change over of dentists it has been 3 weeks since she had her liquid supply changed- supposed to be every week. Is it really a problem? She is going to get nerve removal with a more experienced older dentist and all facilities (potentially microscope, dental rubber, CAT..) that the other one didn't use.