J Korean Dent Sci.  2023 Dec;16(2):192-203. 10.5856/JKDS.2023.16.2.192.

Natural Tooth Color Evaluation in the Korean Elderly Population

• Han BR
• Kim MY
• Kim SH
• Kim JH
• Kim RA

• KMID: 2549614
• DOI: http://doi.org/10.5856/JKDS.2023.16.2.192

Abstract

Purpose
This study is to investigate the distribution of natural tooth shades in the Korean elderly population to quantify the correlation and changes of tooth color with age and gender. In addition, the possible effects of habits on tooth color were assessed.
Materials and Methods
The tooth color of one of the maxillary central incisors of 200 Korean individuals aged 50 to 89 years, males and female, was measured using the portable intraoral spectrophotometer (VITA Easyshade V). CIELab and CIELCh color coordinates were recorded. We conducted the survey about the tobacco smoking, chronic disease, medication, eating habits, oral health behaviors and satisfaction with tooth color. Experimental data were statistically analyzed by using the t-test (P<0.05), two-way analysis of variance and Pearson’s correlation test. Result: The most frequent color in the Korean elderly population was 3M3 & A3.5 shade. L* and h* values decreased, whereas C*, a* and b* values increased progressively with age. There was a significant interaction between age and color coordinates for b* values (r=0.245, P<0.05). Males generally have significantly higher C*, a*, b* values and lower L*, h* value compared to females. Individuals who consumed alcohol had a higher L* value (P<0.05).
Conclusion
Within the limitation of this study, the central incisors were getting darker, more reddish, and yellowish with age. Information on the chromatic range of natural teeth by age and gender could help to select colors for esthetic dental restorations.

Keyword

Aged; Color; Population; Sex; Tooth