DIN ISO/TR 28642:2013-10

The colour appearance of teeth and other dentistry-related tissues needs to be matched and reproduced in order to achieve acceptable aesthetics in an efficient manner. Three major groups of tissues, related to colour compatibility, colour stability and colour interactions, are identified and considered in this guidance. Interpretation of colour differences associated with these three groups through 50:50 % perceptibility and acceptability visual thresholds is suggested. Colour is a psychophysical phenomenon that is assessed by both visual and instrumental methods. Other elements of appearance, including gloss and translucency, affect aesthetics and may influence the characterization of colour appearance. The International Commission on Illumination (CIE) colour difference formulae and resources, in particular CIE Pub No 15.3, were used in this guidance. This standard has been prepared by Working Committee NA 014-00-00-07 AA "Keramiken" ("Ceramics") at the Dentistry Standards Committee (NADENT).