title: Influence of porcine liver esterase on the color of dental resin composites by CIEDE2000 system.
abstract: The objectives of this study were to evaluate the changes in color and color coordinates of dental resin composites after immersion in porcine liver esterase (PLE, 400 mU/mL; a substitute for salivary hydrolase) with CIEDE2000 color system, and to compare those with CIELAB color system. Color of resin composites was measured after immersion in PBS (phosphate buffered saline; control) or PLE up to nine weeks. Color difference (delta E00) and changes in lightness (L'), red-green parameter (a'), yellow-blue parameter (b'), and chroma (C') with CIEDE2000 system were compared. Correlation in the changes of color with CIEDE2000 and CIELAB systems was determined. Delta E00 values after a 9-week immersion in PLE were 0.7-2.8, which were not higher than those in PBS except for a few cases. Changes in b' and C' values after a 9-week immersion in PLE were generally lower than those in PBS, and were in the range of -4.0 to -0.1 and -4.0 to -0.1, respectively. Therefore, the influence of porcine liver esterase on the changes of color and color coordinates was negligible with CIEDE2000 color system. There was a significant correlation between color differences (delta E00 vs deltaE*ab) with CIEDE2000 and CIELAB systems [correlation coefficient (r) = 0.95, p < 0.01].
authors.affiliation: Department of Dental Biomaterials Science, College of Dentistry, Seoul National University, Jongro-gu, Seoul, Korea.
authors.forename: Seung-Heon
authors.initials: SH
authors.lastname: Kim
authors.forename: Yong-Keun
authors.initials: YK
authors.lastname: Lee
authors.forename: Bum-Soon
authors.initials: BS
authors.lastname: Lim
mesh_terms: D000818:Animals; D003116:Color / Q000592:standards*; D003124:Colorimetry / Q000295:instrumentation; D003188:Composite Resins / Q000592:standards*; D004950:Esterases / Q000494:pharmacology*; D008099:Liver / Q000201:enzymology; D008855:Microscopy, Electron, Scanning; D013552:Swine; D013997:Time Factors
chemical_list: D003188:Composite Resins; D004950:Esterases