Materials for use in dentistry; materials and auxiliary materials for the manufacture of dental impressions, models, crowns, bridges, inlays, prostheses, artificial teeth; materials for the characterization of teeth; dental filling materials; materials for relining teeth; materials for root canal filling; core build-up materials for use in dentistry; dental luting materials; materials for cosmetic restoration of damaged teeth; dental composites; dental cements; color stains for use in dentistry; materials for repairing damaged teeth; opaque materials for dental use