Effect of light-curing method on marginal adaptation, microleakage, and microhardness of composite restorations

Journal of Biomedical Materials Research. Part B, Applied Biomaterials
André V RitterLuiz A Pimenta

Abstract

The objective of this study was to investigate the effects of different light-curing methods on microleakage, marginal adaptation, and microhardness of composite restorations. Slot-type preparations were made in bovine teeth, with gingival margins on dentin. Specimens were divided into 12 groups (n = 12) according to composite-light-curing unit (LCU) combinations. Three composites were used: Filtek Supreme, Herculite XRV, and Heliomolar. All restorations were placed using the same adhesive. Four LCUs were used: a quartz-tungsten-halogen (QTH) LCU (Optilux 501), a first-generation light-emitting diode (LED) LCU (FreeLight 1), and two second-generation LED LCUs (FreeLight 2 and Translux Power Blue). After finishing and polishing, specimens were subjected to mechanical load cycling (100,000 cycles). Gingival margin adaptation was determined as a function of gap formation using epoxy replicas. Microleakage was evaluated by measuring dye penetration across the gingival wall in cross-sectioned specimens. Microhardness was measured as Knoop Hardness number (KHN) at different occluso-gingival locations in cross-sectioned specimens. Data were analyzed for statistical significance (p = 0.05) using appropriate statistical tests. Marginal ...Continue Reading

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Citations

Apr 2, 2009·European Journal of Orthodontics·Ascensión VicenteLuis A Bravo
Oct 8, 2011·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Adem KusgozMehmet Tanriver
May 20, 2015·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Raquel Castillo-OyagüeChristopher D Lynch
May 1, 2012·Journal of Dentistry·Moustafa Nabil AboushelibMohammed Hamed Ghazy
Jun 11, 2009·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·John Kanca, Gerald Greitzer

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