title: Microleakage of resin-based sealants after Er:YAG laser conditioning.
abstract: The aim of this in vitro study was to investigate the effects of Er:YAG laser pretreatment procedures in fissure sealing. The fissures of 90 third molars were prepared in the mesial halves with Er:YAG laser (lambda = 2,940 nm, 250 mJ/pulse, 4 Hz, fluence 32 J/cm(2)) and acid etched. They were randomly assigned to three groups, and the fissures in the distal halves were prepared differently according to the group: acid etching alone, bur and etching or Er:YAG laser alone. The fissures were sealed using Clinpro sealant (3M). The extent of microleakage was measured with a digital-image analyzer. The sealants prepared with Er:YAG laser alone displayed greater microleakage than the others (p < 0.05). Er:YAG laser irradiation does not eliminate the need for etching the enamel surface before sealing.
authors.affiliation: Department of Public Health, UFR Odontologie, 24 avenue des Diables Bleus, 06357, Nice cedex 4, France. lupi@unice.fr
authors.forename: Laurence
authors.initials: L
authors.lastname: Lupi-Pégurier
authors.forename: Marie-France
authors.initials: MF
authors.lastname: Bertrand
authors.forename: Olivier
authors.initials: O
authors.lastname: Genovese
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Rocca
authors.forename: Michèle
authors.initials: M
authors.lastname: Muller-Bolla
mesh_terms: D006801:Humans; D066298:In Vitro Techniques; D053844:Lasers, Solid-State; D010895:Pit and Fissure Sealants / Q000528:radiation effects*
chemical_list: D010895:Pit and Fissure Sealants