title: Clinical evaluation of a heat-treated resin composite inlay: 3-year results.
abstract: The purpose of this study was to evaluate a resin composite inlay system in clinical trials involving human subjects. A total of 60 restorations were inserted equally in Class I and II preparations and in premolars and molars. A glass ionomer liner was applied to the dentin. Light-cured direct inlays were fabricated in the oral environment. Thirty inlays were heat-treated for 7.5 minutes at 125 degrees C in a dry heat oven. Enamel margins of the preparations were etched with 37% phosphoric acid gel. All inlays were cemented with a light-cured enamel bonding resin. Restorations were evaluated using the USPHS system and M-L indirect scale. Six, 12, 24 and 36-month recalls were compared to baseline. Color, interfacial staining, secondary caries, and wear were unchanged from baseline for all restorations. Marginal integrity and surface texture show a differential change from baseline and with respect to restoration type. Indirect wear was not significantly different between restoration types (P < 0.05). Wear resistance was not significantly improved with heat treatment, but marginal integrity and surface characteristics showed marked improvement in the heat-treated group at 24 and 36-month recalls.
authors.affiliation: UCONN Health Center, School of Dental Medicine, Department of Restorative Dentistry and Endodontology, Farmington, CT 06032.
authors.forename: S L
authors.initials: SL
authors.lastname: Wendt
authors.forename: K F
authors.initials: KF
authors.lastname: Leinfelder
mesh_terms: D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry*; D006358:Hot Temperature; D006801:Humans; D007284:Inlays; D008027:Light; D008137:Longitudinal Studies; D008855:Microscopy, Electron, Scanning; D008963:Molar; D012015:Reference Standards; D014520:Urethane / Q000737:chemistry*
chemical_list: D003188:Composite Resins; C056413:Occlusin; D014520:Urethane