title: The effect of different drinks on tooth color after home bleaching.
abstract: OBJECTIVE
  This study evaluated the influence of coffee, tea, cola, and red wine staining on the color of teeth after home bleaching.
  
  
  METHODS
  A total of 45 samples were obtained from 45 sound maxillary central incisors. The home bleaching procedure was performed using 10% carbamide peroxide gel applied to the sample surface for a period of 6 h each day, for 14 days. After bleaching, baseline color measurements were taken, and the samples were immersed in four staining solutions (coffee, tea, cola, and red wine) or artificial saliva (n = 9). Following 15 min and 6 h of immersion on the first day and next day, respectively, the samples were washed with distilled water for 10 s. After 15 min, 6 h, 1 week, and 1 month immersions, the color values of each sample were remeasured and the color change values (∆E) were calculated. Color change analysis was performed using a spectrophotometer. The results were analyzed using analysis of variance and Tukey's honestly significant difference test (P <0.05).
  
  
  RESULTS
  Of all the staining solutions, the lowest ∆E values were observed with coffee staining versus artificial saliva (control group), for all time intervals evaluated after whitening. Although no statistically differences were observed between the coffee and control group at all the time points evaluated, there were statistically significant differences between the red wine, cola, and tea solutions.
  
  
  CONCLUSIONS
  Following tooth whitening, patients should avoid drinks that cause tooth staining, particularly red wine, tea and cola.
authors: Department of Restorative Dentistry, Faculty of Dentistry, Recep Tayyip Erdogan University, Rize, Turkiye.
authors: Muhammet
authors: M
authors: Karadas
authors: Department of Restorative Dentistry, Faculty of Dentistry, Ataturk University, Erzurum, Turkiye.
authors: Nilgun
authors: N
authors: Seven
keywords: Bleaching; color change; spectrophotometry