title: Reflectance spectra of composite resins on liners.
abstract: The reflectance spectra of two types of composite resins were determined on various backgrounds. It was found that the shade differences caused by different "whitish" liners were perceptible only for thin resin specimens and were smaller than those caused by varying the resin type and thickness. Employing a light brown liner gave rise to a difference in shade which was also perceptible on resin specimens of 2.5 mm thickness. Shade differences due to varying the thickness of the specimens were more pronounced on white than on black backgrounds. The clinical significance and the qualitative physical interpretation of the results were discussed.
mesh_terms: D002126:Calcium Hydroxide; D002130:Calcium Phosphates; D003116:Color; D003188:Composite Resins; D003736:Dental Cavity Lining; D003737:Dental Cavity Preparation; D008027:Light; D010636:Phenols; D011137:Polystyrenes; D013053:Spectrophotometry; D013943:Thymol / Q000031:analogs & derivatives; D015035:Zinc Oxide-Eugenol Cement
chemical_list: D002130:Calcium Phosphates; D003188:Composite Resins; D010636:Phenols; D011137:Polystyrenes; D015035:Zinc Oxide-Eugenol Cement; D013943:Thymol; D002126:Calcium Hydroxide