A dental cartridge for dispensing a dental material having a body portion made of a material transparent to at least a portion of the visible light spectrum and opaque to the actinic light of the dental material contained therein. Also, a dental cartridge having a body portion formed from a toroidal...http://www.google.com.au/patents/US5267859?utm_source=gb-gplus-sharePatent US5267859 - Bulk dental cartridge
