title: Marginal adaptation of class V restorations with current-generation dentin-bonding agents: effect of different dentin surface treatments.
abstract: This study sought to assess the use of chlorhexidine with several excipients as a dentin surface treatment and its effect on marginal adaptation of class V restorations with current-generation dentin bonding agents. A total of 120 human third molars were selected and allocated into 12 groups, with standardized buccal class V restorations randomly divided into preconditioned dentin rinsed with: water; water + chlorhexidine; ethanol; or ethanol + chlorhexidine. After rinsing of dentin (previously conditioned with 35% phosphoric acid) with the test solutions, the Adper single bond 2, prime and bond 2.1, and Excite bonding systems were applied randomly. Restorations were performed with Filtek™ Z350 XT composite resin. The resulting specimens were subjected to thermal and mechanical load cycling. Quantitative analysis of marginal adaptation was performed on epoxy replicas by means of scanning electron microscopy. Results were assessed by means of the Kruskal-Wallis test (percentages of continuous margins) and Wilcoxon test (differences between percentages of continuous margins before and after thermal cycling and mechanical loading), at a significance level of p < 0.05. Outcomes in the chlorhexidine-treated groups were not superior to those obtained with other treatments.
authors.affiliation: Undergraduate Student, Department of Dentistry, UNESP, Araraquara, SP, Brazil.
authors.forename: Jessica Patrícia
authors.initials: JP
authors.lastname: Cavalheiro
authors.affiliation: Professor, Department of Postgraduation in Integrated Dental Sciences University of Cuiaba, MT, Brazil.
authors.forename: Mateus Rodrigues
authors.initials: MR
authors.lastname: Tonetto
authors.affiliation: Professor, Department of Postgraduation in Dentistry, CEUMA University, São Luis, MA, Brazil, e-mail: mateus.tonetto@foar.unesp.br.
authors.forename: Álvaro Henrique
authors.initials: ÁH
authors.lastname: Borges
authors.affiliation: Professor, Department of Postgraduation in Dentistry, CEUMA University, São Luis, MA, Brazil.
authors.forename: Matheus Coelho
authors.initials: MC
authors.lastname: Bandéca
authors.affiliation: Professor, Department of Postgraduation in Dentistry, CEUMA University, São Luis, MA, Brazil.
authors.forename: Reidson Stanley Soares
authors.initials: RS
authors.lastname: dos Santos
authors.affiliation: Professor, Department of Restorative Dentistry, UNESP, Araraquara SP, Brazil.
authors.forename: Edson Alves
authors.initials: EA
authors.lastname: de Campos
authors.affiliation: Professor, Department of Restorative Dentistry, UNESP, Araraquara SP, Brazil.
authors.forename: José Roberto Cury
authors.initials: JR
authors.lastname: Saad
authors.affiliation: Professor, Department of Restorative Dentistry, UNESP, Araraquara SP, Brazil.
authors.forename: Andréa Abi Rached
authors.initials: AA
authors.lastname: Dantas
authors.affiliation: Professor, Department of Restorative Dentistry, UNESP, Araraquara SP, Brazil.
authors.forename: Marcelo Ferrarezi
authors.initials: MF
authors.lastname: de Andrade
mesh_terms: D000096:Acetone / Q000737:chemistry; D000134:Acid Etching, Dental / Q000379:methods; D002710:Chlorhexidine / Q000494:pharmacology; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods*; D003738:Dental Cements / Q000737:chemistry; D003743:Dental Enamel / Q000648:ultrastructure; D018772:Dental Marginal Adaptation; D003775:Dental Polishing / Q000379:methods; D003793:Dental Restoration, Permanent / Q000145:classification*; D003804:Dentin / Q000187:drug effects / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D000431:Ethanol / Q000494:pharmacology; D006801:Humans; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D016628:Replica Techniques; D016369:Smear Layer; D012997:Solvents / Q000494:pharmacology; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D014867:Water
chemical_list: C554641:Adper single bond 2; D003188:Composite Resins; D003738:Dental Cements; D017220:Dentin-Bonding Agents; C420130:Excite cement; D008689:Methacrylates; D010756:Phosphoric Acids; D011109:Polymethacrylic Acids; D012997:Solvents; C533204:filtek Z350; C444444:prime and bond 2.1; D014867:Water; D000096:Acetone; D000431:Ethanol; C030242:phosphoric acid; D002710:Chlorhexidine