title: Micro-shear bond strength of two all-in-one adhesive systems to unground fluorosed enamel.
abstract: The aim of this study was to evaluate the micro-shear bond strengths of two all-in-one adhesive systems to unground fluorosed enamel. Buccal surfaces of 24 normal and 24 moderately fluorosed teeth (Thylstrup and Fejerskov index, TFI=4-6) were bonded using G-Bond and Clearfil Tri-S Bond. The surfaces were then restored with a resin composite, stored for 24 hours in water, and tested for micro-shear bond strength (MSBS). Fracture modes, etching patterns, and adhesive interfaces were studied under a scanning electron microscope (SEM). Data were analyzed with two-way ANOVA, whereby no significant differences in MSBS were found among the four groups (p>0.05). Through SEM examination, it was shown that 1 microm of resin tag-like extensions had penetrated into the enamel for both adhesives at the enamel-adhesive interface. Based on the results obtained, it was concluded that MSBS was not influenced by the severity of fluorosis. Furthermore, there were no differences in enamel bond strength between G-Bond and Clearfil Tri-S Bond.
authors: Department of Fixed Prosthodontics, Tsurumi University School of Dentistry, 2-1-3, Tsurumi-ku, Yokohama, Japan.
authors: Priyadarshanee Manorika
authors: PM
authors: Ratnaweera
authors: Toru
authors: T
authors: Nikaido
authors: Dinesh
authors: D
authors: Weerasinghe
authors: Kamal Anuradha
authors: KA
authors: Wettasinghe
authors: Hiroyuki
authors: H
authors: Miura
authors: Junji
authors: J
authors: Tagami
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D016009:Chi-Square Distribution; D003743:Dental Enamel / Q000737:chemistry / Q000648:ultrastructure; D019232:Dental Restoration Failure; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D009050:Fluorosis, Dental; D006801:Humans; D008689:Methacrylates / Q000737:chemistry*; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D018709:Statistics, Nonparametric
chemical_list: C515604:Clearfil Tri-S Bond; D017220:Dentin-Bonding Agents; C498353:G-Bond; D008689:Methacrylates; D019279:Resin Cements