title: Effect of Fluoride and Simplified Adhesive Systems on the Bond Strength of Primary Molars and Incisors.
abstract: The aim of this study was evaluate in vitro the influence of simplified adhesive systems (etch-and-rinse and self-etching) and 1.23% acidulated phosphate fluoride (APF) on the microshear bond strength (μ-SBS) of composite resins on primary molars and incisors. Forty primary molars and forty incisors vestibular enamel was treated with either the self-etching Clearfil SE Bond (CSE, Kuraray) or etch-and-rinse Adper Single Bond 2 (SB2, 3M/ESPE) adhesive system. Each group was subdivided based on the prior treatment of the enamel with or without the topical application of 1.23% APF. Thereafter, matrices were positioned and filled with composite resin and light cured. After storage in distilled water at 37 ± 1°C for 24 h, the specimens were submitted to μ-SBS in a universal testing machine. Kruskal-Wallis and Mann-Whitney tests (p < 0.05) showed that the prior application of 1.23% APF led to a significant reduction in bond strength. The type of adhesive exerted no significant influence bond strength. In the inter-group analysis, however, significantly bond strength reduction was found for the incisors when CSE was employed with APF. Adhesive failure was the most common type of fracture. The bond strength was affected by the prior application of 1.23% APF and type of tooth.
authors: Dentistry Department I, Universidade Federal do Maranhão, São Luís, MA, BR.
authors: Leily Macedo
authors: LM
authors: Firoozmand
authors: Dentistry Department, Universidade Ceuma, São Luís, MA, BR.
authors: Lawanne Ellen Carvalho
authors: LE
authors: Noleto
authors: Dentistry Department, Universidade Ceuma, São Luís, MA, BR.
authors: Isabella Azevedo
authors: IA
authors: Gomes
authors: Dentistry Department I, Universidade Federal do Maranhão, São Luís, MA, BR.
authors: José Roberto de Oliveira
authors: JR
authors: Bauer
authors: Dentistry Department, Universidade Ceuma, São Luís, MA, BR.
authors: Meire Coelho
authors: MC
authors: Ferreira
mesh_terms: D000269:Adhesives; D001840:Dental Bonding; D005459:Fluorides / Q000494:pharmacology*; D006801:Humans; D007180:Incisor; D008422:Materials Testing; D008963:Molar
chemical_list: D000269:Adhesives; D005459:Fluorides