dental implants made of artificial materials; implant fixture for dental purposes in the nature of implants comprising natural, non-living materials; implant abutments for dental purposes; metal screws for medical use in the nature of cover screws for dental purposes; dental pins, namely, pins for artificial teeth; dental screws in the nature of bone screws; metal guidewires in the nature of orthodontic guidewires; instruments for use in prosthetic dental surgery; filling instruments for dent...