Premium
Investigation on vermilion, gingiva, and tooth color of young Uygur and Han populations in Xinjiang, China
Author(s) -
Gao Chengzhi,
Adalet Khasim,
Liu Haishan,
Wang Jing
Publication year - 2010
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/col.20582
Subject(s) - vermilion , lightness , hue , dentistry , anterior teeth , medicine , orthodontics , art , visual arts , physics , artificial intelligence , computer science , optics
Abstract This study examines oral tissue color in Uygur and Han Chinese populations. The color of oral tissues is of great significance in dental field. It remains uncertain whether there is any difference in the color of oral tissues between different nationalities or ethnicities. Little is known about the color of oral tissues in different Chinese populations. The study included 263 Uygur and Han students aged 18–22 years. The color of anterior teeth, vermilion, and attached gingiva in the subjects was measured by spectrophotometry and expressed through the CIELCh system. The t test and ANOVA was used to analyze color difference between groups. Distribution ranges for L * ab(lightness), C * ab(chroma) and h * ab(hue angle) of anterior teeth, vermilion, and attached gingiva in these two ethnicities were obtained. Significant differences in color of oral tissues between Uygur and Han Ethnicities were found out. The Uygur and Han populations have similar spatial distribution ranges for the color of oral tissues, with slight differences that displayed strong regularities, suggesting that the color of oral tissues was associated with race. In addition, there was a trend of decreasing lightness (especially for maxillary anterior teeth), increasing chroma and redder hue from the center of teeth toward the sides in both ethnicities. There were differences in the color of teeth and attached gingiva between sexes in the Uygur and Han populations. The color of the upper vermilion differed significantly from that of the lower vermilion. © 2010 Wiley Periodicals, Inc. Col Res Appl, 2010