A fiber optic illumination system for dental instruments of the present invention enables a light source to provide light to the oral cavity using a single continuous polymethyl methacrylate optical fiber axially fitted into a cylindrical tube, open at both ends, and affixed to a dental instrument, such...http://www.google.de/patents/US5281134?utm_source=gb-gplus-sharePatent US5281134 - Fiber optic illumination system for dental instruments
