Natural Tooth Color Estimation Based on Age and Gender

Abstract

In this sample of Caucasians from Spain, teeth became darker yellow and more reddish with increasing age. The L* coordinate is most strongly related to tooth color in aging.

Changes of tooth color in middle and old age: A longitudinal study over a decade

“…The change detected was comparable with the color difference between 2 hue groups in the 3D shade guide (VITA Zahnfabrik, Bad Säckingen, Germany) and, therefore, slightly lower (Δ h° 2–2.4 units) than the hue change estimated on the basis of a cross‐sectional study (0.6 units/year × 8 years = 4.8 units). In contrast with previous reports, changes of lightness and chroma seem to be age‐cohort‐specific. Especially, a linear decrease of lightness and a linear increase of chroma during aging may be qualified by the recent data .…”

“…In contrast with previous reports, changes of lightness and chroma seem to be age‐cohort‐specific. Especially, a linear decrease of lightness and a linear increase of chroma during aging may be qualified by the recent data . Whereas the teeth of the septuagenarians became more saturated—possibly giving the visual impression of becoming darker—clinically relevant darkening of 4 Δ L units was only observed for the teeth of quinquagenarians.…”

“…This longitudinal approach partially confirms results from a previous cross‐sectional study. A change of hue ( h °) toward red/an increase of redness ( a *) found in previous study was confirmed longitudinally for both cohorts. The change detected was comparable with the color difference between 2 hue groups in the 3D shade guide (VITA Zahnfabrik, Bad Säckingen, Germany) and, therefore, slightly lower (Δ h° 2–2.4 units) than the hue change estimated on the basis of a cross‐sectional study (0.6 units/year × 8 years = 4.8 units).…”

“…Survival of fixed dental prostheses is long‐term, exceeding 10 or more years . However, because, over this long period in clinical service of the dental prosthesis, the color of natural teeth changes substantially, a mismatch of color will develop …”

A study on the color distribution of natural teeth by age and gender in the Korean population with an intraoral spectrophotometer

“…On the contrary, the hue shift toward red was relatively small with increasing age. Previous studies reported that changes in b* variable increased by 0.10‐0.18 per year and L* variable decreased by 0.22‐0.28 per year . Although it might be difficult to compare directly with those studies, tooth color would shift toward yellow range by approximately 0.08‐0.13 b* units and darker by approximately 0.15‐0.16 L* units per year in this study.…”