Er:YAG laser cavity preparation and composite resin bonding with a single-component adhesive system: Relationship between shear bond strength and microleakage

• Published in: Lasers in surgery and medicine Vol. 38; no. 6; pp. 615 - 623
• Main Authors: Bertrand, Marie-France, Semez, Gianfranco, Leforestier, Eric, Muller-Bolla, Michèle, Nammour, Samir, Rocca, Jean-Paul
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.07.2006
• Subjects: Aluminum; composite resin; Dental Bonding; Dental Cavity Preparation - methods; Dental Leakage; Er:YAG laser; Erbium; Lasers; Materials Testing; microleakage; shear bond strength; Shear Strength; Yttrium
• ISSN: 0196-8092; 1096-9101
• DOI: 10.1002/lsm.20342

Background and Objectives The purpose of this study was to assess the performances of a single‐component adhesive system when an Er:YAG laser was used to prepare cavities. Study Design/Materials and Methods Shear bond strength tests were performed on composite rods bonded with a single‐component adhesive system to dentin surfaces prepared using either bur+acid, Er:YAG laser (fluence = 44 J/cm2), or Er:YAG laser+acid. Class V cavities were prepared differently according to the molar surface: buccal surfaces were prepared using a diamond bur, and lingual surfaces using the Er:YAG laser. In group 1, cavity walls were not acid treated after Er:YAG laser preparation. In group 2, only the enamel walls were acid treated. In group 3, all the enamel and dentin walls were acid treated. Microleakage was assessed using a methylene blue dye penetration method. Results Bond strength values did not differ significantly between the three groups (P = 0.162). Better marginal adaptation was obtained between the composite resin and cavity walls when Er:YAG laser preparation was followed by a total acid etching (P = 0.008). Conclusions Our results supported the use of single‐component adhesive systems in cavities prepared using Er:YAG laser. The step of acid etching must be maintained for the whole cavity walls in regard of the microleakage values. Lasers Surg. Med. 38:615–623, 2006. © 2006 Wiley‐Liss, Inc.