title: Ultrasonic sulcus penetration: a new approach for full crown preparations.
abstract: Newly developed ultrasonic diamond-coated tips (UDT) have been created for sulcus penetration and intracrevicular finish line preparation and polishing. One hundred forty-two freshly extracted premolars and molars were employed for a cutting efficiency test. Dentin surface roughness was analyzed with an optical profilometer and a scanning electron microscope. Within a reasonable cutting time, the UDTs possessed sufficient dentin-cutting capacity. The surface roughness of dentin prepared with the UDT can be improved by using a smaller grit size UDT or a smooth tip set at lower power, and the roughness approaches that of dentin prepared with a referenced red diamond bur. A clinical protocol of ultrasonic sulcus penetration with these developed UDTs is proposed.
authors.affiliation: dr.marcsous@wanadoo.fr
authors.forename: Marc
authors.initials: M
authors.lastname: Sous
authors.forename: Yann
authors.initials: Y
authors.lastname: Lepetitcorps
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Lasserre
authors.forename: Ngampis
authors.initials: N
authors.lastname: Six
mesh_terms: D001641:Bicuspid / Q000473:pathology; D003442:Crowns; D003804:Dentin / Q000473:pathology; D018130:Diamond; D004867:Equipment Design; D005240:Feasibility Studies; D005881:Gingiva / Q000473:pathology; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D008963:Molar / Q000473:pathology; D010316:Particle Size; D019237:Tooth Cervix / Q000473:pathology; D019231:Tooth Preparation, Prosthodontic / Q000295:instrumentation / Q000379:methods*; D014465:Ultrasonics; D014732:Vibration
chemical_list: D018130:Diamond