Treating early tooth decay could become easier and less painful thanks to a new discovery by Japanese scientists. “Dental paste of synthetic tooth enamel could revolutionize treatment of tiny early lesions”, – says the study published today in the journal Nature by Dr Kazue Yamagishi, of the FAP Dental Institute, Tokyo. Dentists usually treat cavities by removing of the affected part, then filling the hole with a resin or metal alloy. This is less than ideal because a lot of healthy tooth must be removed to make the fillings stick.