Japan tooth patch could be end of decay - FRANCE 24Handout picture released from Japan's Kinki University professor Shigeki Hontsu shows a tooth-patch, an ultra thin biocompatible film made from hydroxyapatitte. Scientists in Japan have created a microscopically thin film that can coat individual teeth to prevent decay or to make them appear whiter, the chief researcher said. AFP - Scientists in Japan have created a microscopically thin film that
