A light shield device shields radiation used for curing composites during dental restoration. The device is configured to include a clamping section with variable clamping diameters and a tapered shielding section. The device is formed with a material that allows a tight frictional engagement with a...http://www.google.es/patents/US4615679?utm_source=gb-gplus-sharePatente US4615679 - Light shield for use with light curing apparatus
