Influencing factors of gingival color in central incisor area of healthy Han nationality in Shanghai / 第二军医大学学报

ABSTRACT

Objective: To observe the gingival color of healthy Han nationality in Shanghai, so as to discuss the gingival color distribution and its influencing factors. Methods: The Chroma Meter CR-321 was used to obtain the CIE-1976-L* a* b* value in predefined testing spots of gingiva in healthy Han nationality in Shanghai. The gingival color distribution and the influences of age, sex on the gingival color were summarized. Results: We found that the L* values of attached gingiva of the median line(P=0.0061), free gingiva of central incisor(P = 0.0324), attached gingiva in the root of central incisor (P=0.029 7), and distal incisor attached gingiva (P=0.0324) in the female were significantly higher than those in the male; the a* b* values in attached gingiva of median line (P = 0.0083, P = 0.0020) were significantly higher than those in male; and the other a*, b* values were similar between the males and females. The color difference ΔE between free gingiva and attached gingiva was > 2 (P<0.01). ΔL*2 had the greatest influence on ΔE, with the standardized regression coefficient being b' = 0.88216, followed by Δa*2 and Δb*2 in order, with b' being 0.23097 and 0.06632, respectively. L*, a*, and b* values had no obvious relation to age. Conclusion: It is indicated that sex and age have little influence on the color of gingiva in Han nationality in Shanghai. Obvious color difference exists between the free gingiva and the attatched gingiva.