title: Evaluation of ultrasonic and ErCr:YSGG laser retrograde cavity preparation.
abstract: Root end cavity preparation techniques aim to create a clean and properly shaped cavity in a short time. Although the use of ultrasonics has been widely recommended, a laser can also be used. This study evaluated the time required and quality of retrograde cavity preparations using ultrasonics or ErCr:YSGG laser. Thirty single-rooted teeth were instrumented, root filled, submitted to apicectomies, and grouped. Root end cavities were prepared by using the following: group 1 (G1): CVD (6.1107-6) ultrasonic retrotips (CVD-Vale, São José dos Campos, Brazil); group 2 (G2): EMS (DT-060/Berutti) ultrasonic retrotips (EMS, LeSentier, Switzerland); and group 3 (G3): ErCr:YSGG (G6/Waterlase; Biolase Technology, San Clemente, CA) laser tips. The time taken to complete the preparation was recorded. Epoxy resin replicas of the root apices were examined under a scanning electron microscope. The parameters for evaluation were the presence of fractures, and the quality of the preparations. The Waterlase showed the highest mean time for preparation of the root end cavities (p < 0.05), and there was no significant difference between the CVD and EMS groups (p > 0.05). Fractures in the cavosurface angle occurred only in G2. G1 and G2 showed better scores for quality of preparation than G3 (p < 0.05). These results suggest that root end cavities should be prepared by ultrasonic tips.
authors.affiliation: Department of Restorative Dentistry, Araraquara Dental School, São Paulo State University, UNESP, Araraquara, SP, Brazil.
authors.forename: Norberto
authors.initials: N
authors.lastname: Batista de Faria-Junior
authors.forename: Mário
authors.initials: M
authors.lastname: Tanomaru-Filho
authors.forename: Juliane Maria
authors.initials: JM
authors.lastname: Guerreiro-Tanomaru
authors.forename: Renato
authors.initials: R
authors.lastname: de Toledo Leonardo
authors.forename: Fábio Luiz
authors.initials: FL
authors.lastname: Camargo Villela Berbert
mesh_terms: D001047:Apicoectomy / Q000379:methods; D003188:Composite Resins / Q000627:therapeutic use; D003786:Dental Pulp Cavity / Q000601:surgery / Q000648:ultrastructure; D004853:Epoxy Resins / Q000627:therapeutic use; D004867:Equipment Design; D005899:Glass Ionomer Cements / Q000627:therapeutic use; D006171:Gutta-Percha / Q000627:therapeutic use; D006801:Humans; D053685:Laser Therapy / Q000009:adverse effects / Q000379:methods*; D053844:Lasers, Solid-State / Q000627:therapeutic use*; D008855:Microscopy, Electron, Scanning; D016628:Replica Techniques; D012387:Root Canal Filling Materials / Q000627:therapeutic use; D018915:Root Canal Preparation / Q000379:methods*; D012965:Sodium Chloride; D013696:Temperature; D013997:Time Factors; D019227:Tooth Apex / Q000601:surgery* / Q000648:ultrastructure; D014464:Ultrasonic Therapy / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*
chemical_list: D003188:Composite Resins; D004853:Epoxy Resins; D005899:Glass Ionomer Cements; D012387:Root Canal Filling Materials; C084550:Vitremer; C534916:epoxy resin-based root canal sealer; D012965:Sodium Chloride; D006171:Gutta-Percha