title: Marginal integrity of resin composite restorations restored with PPD initiatorcontaining resin composite cured by QTH, monowave and polywave LED units.
abstract: This study evaluated the influence of curing devices on marginal adaptation of cavities restored with self-etching adhesive containing CQ and PPD initiators and hybrid composite. Twenty-four class V (3 groups, n=8) with margins located on enamel and dentin were restored with Clearfil S3 Bond and Clearfil APX PLT, light-cured with a monowave LED, multiwave LED and halogen light-curing unit (LCU). Marginal adaptation was evaluated with SEM before/after thermo-mechanical loading (TML). On enamel, significantly lower % continuous margins (74.5±12.6) were found in group cured by multiwave LED when compared to monowave LED (87.6±9.5) and halogen LCU (94.4±9.1). The presence of enamel and composite fractures was significantly higher in the group light-cured with multiwave LED, probably due to an increased materials' friability resulted from an improved degree of cure. The clinician should aware that due to a distinct activation of both initiators, marginal quality may be influenced on the long-term.
authors.affiliation: Division of Cariology and Endodontology, University Clinic of Dental Medicine, University of Geneva.
authors.forename: Tissiana
authors.initials: T
authors.lastname: Bortolotto
authors.forename: Francisco
authors.initials: F
authors.lastname: Betancourt
authors.forename: Ivo
authors.initials: I
authors.lastname: Krejci
mesh_terms: D003188:Composite Resins; D055117:Curing Lights, Dental; D003737:Dental Cavity Preparation; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent; D006801:Humans; D019279:Resin Cements
chemical_list: D003188:Composite Resins; D019279:Resin Cements