title: Silorane, ormocer, methacrylate and compomer long-term staining susceptibility using ΔE and ΔE 00 colour-difference formulas.
abstract: The aim of this study was to evaluate the staining susceptibility of a silorane (Filtek Silorane), an ormocer (Ceram X Duo), a methacrylate (Tetric EvoCeram) and a compomer (Dyract) exposed on the long term to various staining agents by using ΔE and ΔE 00 colour-difference formulas. Thirty-six disc-shaped specimens were made of each of the four chemically different materials, randomly divided in six groups (n = 6) and immersed in five staining solutions (red wine, juice, coke, tea and coffee) or stored dry (control) in an incubator at 37 °C for 99 days. Spectrophotometric measurements by means of a spectrophotometer (Spectroshade Handy Dental, MHT) were repeated over a white (L* = 92.6, a* = -1.2, b* = 2.9) and black (L* = 1.6, a* = 1.2, b* = -1.0) background made of plasticized paper, in order to determine the colour changes according to ΔE, ΔE 00 and translucency formulas. Statistical analysis was performed by means of factorial Anova, Fisher's LSD test (post hoc) and a Spearman rank correlation between ΔE and ΔE 00. When analysed over a white background, mean ΔE 00 values were highly significantly different and varied from 0.8 (Ceram X Duo/air) to 20.9 (Ceram X Duo/red wine). When analysed over a black background, mean ΔE 00 values were highly significantly different and varied from 1.0 (Ceram X Duo and Tetric/air) to 25.2 (Ceram X Duo/red wine). Differences in translucency varied from 0.3 (Ceram X Duo/air) to 21.1 (Ceram X Duo/juice). The correlation between ΔE and ΔE 00 over a white background was 0.9928, while over a black background, it was 0.9886.
authors.affiliation: Division of Cariology and Endodontology, University Clinic of Dental Medicine (CUMD), University of Geneva, Rue Barthélemy-Menn 19, 1205, Geneva, Switzerland.
authors.forename: Ladislav
authors.initials: L
authors.lastname: Gregor
authors.affiliation: Division of Cariology and Endodontology, University Clinic of Dental Medicine (CUMD), University of Geneva, Rue Barthélemy-Menn 19, 1205, Geneva, Switzerland.
authors.forename: Ivo
authors.initials: I
authors.lastname: Krejci
authors.affiliation: Department of Economics and Quantitative Methods, University of Genoa, Genoa, Italy.
authors.forename: Enrico
authors.initials: E
authors.lastname: Di Bella
authors.affiliation: Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands.
authors.forename: Albert J
authors.initials: AJ
authors.lastname: Feilzer
authors.affiliation: Treatment Plan Unit and Division of Cariology and Endodontology, University Clinic of Dental Medicine (CUMD), University of Geneva, Rue Barthélemy-Menn 19, 1205, Geneva, Switzerland. stefano.ardu@unige.ch.
authors.forename: Stefano
authors.initials: S
authors.lastname: Ardu
mesh_terms: D002253:Carbonated Beverages; D003069:Coffee; D003116:Color; D020770:Compomers / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D000067030:Fruit and Vegetable Juices; D066298:In Vitro Techniques; D008422:Materials Testing; D062047:Silorane Resins / Q000737:chemistry*; D013053:Spectrophotometry; D013499:Surface Properties; D013662:Tea; D014920:Wine
chemical_list: C520091:CeramX; D003069:Coffee; D020770:Compomers; D003188:Composite Resins; D003764:Dental Materials; C088486:Dyract; D062047:Silorane Resins; D013662:Tea; C501891:Tetric EvoCeram; C555513:silorane composite resin
keywords: Compomer; Methacrylate; Ormocer; Silorane; Staining