Clinical effects of dehydration on tooth color: How much and how long?
Hüseyin Hatırlı, Emine Şirin Karaarslan, Bilal Yaşa, Enes Kılıç, Ayla Yaylacı
Abstract
OBJECTIVE: To evaluate effects of dehydration on tooth color determine whether color returns to baseline after 30 min or 24 h. MATERIALS AND METHODS: Thirty participants with intact maxillary central and lateral incisors were recruited for the study. Color measurements were performed with a spectrophotometer (SpectroShade Micro) at baseline and at 10, 20, and 30 min of dehydration, as well as 30 min and 24 h of rehydration. CIEDE2000 color parameters were used to calculate color difference. The data were analyzed for color changes over time by repeated-measures analysis of variance (ANOVA), and the Bonferroni-Tukey test was used for post-ANOVA comparisons (P < .05). RESULTS: = 1.8). After 30 min of rehydration, 78.3% of the tested teeth were above the perceptibility threshold, and 31.6% of the teeth were above the acceptability threshold. After 24 h of rehydration, 99.2% of the teeth were below the acceptability threshold, and 90% of the values were below the perceptibility threshold. CONCLUSIONS: Thirty-minute tooth dehydration can result in a clinically significant color change. After a 24-h rehydration period, reliable color assessment can be performed. CLINICAL SIGNIFICANCE: Tooth dehydration causes significant color change, thus assessment of final color or clinical success should be considered after tooth rehydration for esthetic restorations and tooth bleaching.