Rotary endodontic cutting instruments in the nature of engine-driven and hand rotary files for the cleaning and shaping of root canals in teeth; dental instruments in the nature of electric hand-held drills, picks, oral irrigators, intra-oral light systems, dental files for filing and smoothing the surface of teeth and dental crowns; dental instruments, namely, rotary cutting instruments, diamond coated or fluted carbide rotary instruments for accessing the pulpal chamber during root canal therapy; hand instruments designed to be used during access, instrumentation and obturation steps of root canal therapy, namely, dental instruments in the nature of endodontic spreaders, pluggers, explorers, pliers, excavators, and forceps; non-metal posts and pins for use during restoration of tooth following root canal therapy