You probably think to visit the dental clinic when you realize you got cavity. Actually, cavity is developed much earlier than you think. If you feel the cavity, such a tooth usually had an early cavity more than 6 years ago. So, it is too late to visit the dental clinic if you realize the cavity. You had better visit the dental clinic regularly when you feel nothing. Otherwise, the treatment may be too complex to be done. Here I made a video to explain the cavity treatment. Please check it out.  A director of Tokyo International Dental Clinic Roppongi. Hiroshi