73185002
Sep 8, 1978
May 12, 1981
Endodontic Teaching Aid-Namely, Transparent Machineable Plastic Block Material with a Hole Entering One Face, the Hole Simulating a Root Canal of a Human Tooth, Whereby a File as Used in Endodontia May Be Reciprocated in the Hole to Simulate the Filing of a Human Root Canal
Electrical and Scientific Apparatus