title: Clinical and SEM study of Tetric resin composite in posterior teeth: 12-month results.
abstract: Thirty-nine conventional posterior composite fillings were placed according to the three-sited light curing technique using Tetric, a fine hybrid composite material, and Syntac, a dentin adhesive. Six and 12 months later, the restorations were clinically evaluated using macrophotographs. A quantitative marginal analysis was also done immediately after placing the restorations and at the two recall intervals using a replica technique and an SEM. Contour, secondary caries, postoperative sensitivity and bulk fractures all rated "A" at 12 months. Marginal discoloration and color match were scored as 97% "A" and 3% "B". The SEM evaluation of the marginal adaptation showed 95% "continuous margin" initially and 93% at 6 months and 89% at 12 months. No statistical difference was found between the initial findings and the 12-month recall between premolars and molars, nor between small and large restorations. The overall performance of the new composite material during the 12-month observation period was satisfactory.
authors.affiliation: Department of Preventive Dentistry, Periodontology and Cariology, Dental Institute, Zurich University, Switzerland.
authors.forename: I
authors.initials: I
authors.lastname: Krejci
authors.forename: M
authors.initials: M
authors.lastname: Besek
authors.forename: F
authors.initials: F
authors.lastname: Lutz
mesh_terms: D001641:Bicuspid; D016009:Chi-Square Distribution; D003188:Composite Resins / Q000737:chemistry; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000379:methods*; D005500:Follow-Up Studies; D006801:Humans; D008855:Microscopy, Electron, Scanning; D008963:Molar; D019279:Resin Cements; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D019279:Resin Cements; C078484:Syntac dentine adhesive; C090969:Tetric