40 Treatment of materials by means of milling, drilling, laser beams, cutting, polishing, ablation, polymerization, electron beam, DV and visible light, namely, treatment of materials for the manufacture of products for dental medicine and dental technology, dental blanks, dental restorations and parts thereof, dental crowns, dental prostheses, artificial teeth, onlays, inlays, veneers; dental laboratory services and dental technician services; custom manufacture of dental prosthetics for others, namely, milling of dental crowns, inlays, onlays, abutments and bridges; contract manufacturing in the field of parts for dental restorations, namely, crown caps and bridge frameworks made of plastic, ceramic and metal