Effect of preference drinks on tooth color reduction after tooth bleaching: A 12-momth follow-up study / 대한구강보건학회지

OBJECTIVES: This study aimed to observe the decrease in tooth color after home and office bleaching due to consumption of juice, soda, and coffee over a period of one year. METHODS: We obtained written consent from 30 subjects, who were divided into two groups i.e., home bleaching and office bleaching groups. They were treated with opalessence® and Zoom2 whitening gel, and the color of their teeth was assessed using shade Eye-NCC over a one-year period. A self-describing questionnaire was used to determine the frequency of juice, soda, and coffee consumption. RESULTS: The changes in color were measured before and after 1 day, 1 month, 3 months, 6 months, and 12 months. Although the tooth color slightly changed after 12 months, the teeth were brighter than the original color. Consumption of juices, sodas, and coffee is thought to be associated with decrease in tooth color, although the change was not statistically significant. CONCLUSIONS: The ΔE* values showed that the tooth bleaching effect remained for 12 months. Consuming a normal amount of juice, sodas, and coffee does not significantly reduce tooth color after tooth bleaching.

Tooth color reduction and consequent patient satisfaction after office and home bleaching: a 6-month follow-up study / 대한구강보건학회지

OBJECTIVES: The quest for a happy life is accompanied by an increase in social activities, living standards, and socioeconomic development, with individuals showing increased interest in health and esthetics. In the field of dentistry, not only prevention and treatment but also esthetics is gaining popularity. The aim of this study was to identify tooth color reduction and consequent patient satisfaction over a period of 6 months after office and home bleaching. METHODS: Thirty subjects were divided using the convenience sampling method into two groups based on the bleaching agent used: 10% carbamide peroxide (CP10; home bleach) and 15% hydrogen peroxide (office bleach). CP10 was used at home in a tray for 2 h/day over 14 days, while 15% hydrogen peroxide was light-activated for 15 min, three times/session (total, 45 min). A control set of teeth without any bleaching treatment was used as reference. Shade evaluation was conducted using the Shade Eye NCC at baseline, 1 week, and 1 and 6 months after bleaching. Data were analyzed using the Mann-Whitney U test and the nonparametric Friedman test. RESULTS: There were significant differences in tooth color before and after bleaching in both the home and office bleach groups, although intergroup differences were not observed. Although b* values after bleaching were lower than the original values, only slight tooth color reduction was observed at 6 months. DeltaE*, which represents the overall change in color, at 1 and 6 months after bleaching was significantly different from that at baseline in the home bleach group, while it showed no significant differences in the office bleach group. According to a patient satisfaction survey, patient satisfaction significantly increased over time in the home bleach group, although it did not differ significantly between groups. CONCLUSIONS: Tooth whitening was observed after bleaching in both groups. However, slight color reduction was observed at 6 months after bleaching, and complete restoration to the color before bleaching did not occur; therefore, long-term observation of color reduction is required.

Comparison of the whitening effect of toothpastes containing 0.25% hydroxyapatite and 0.75% hydrogen peroxide / 대한구강보건학회지

OBJECTIVES: The aim of this study was to compare the tooth bleaching effect of two whitening materials in toothpaste i.e., hydroxyapatite and hydrogen peroxide on. In a randomized, double blinded controlled clinical trial, 85 participants with tooth colorations were assigned to use one of three toothpastes containing either hydroxyapatite (0.25%), hydrogen peroxide (0.75%), or no active ingredient (placebo). The patients were examined at baseline and 1, 2, and 3 months after usage. METHODS: The patients underwent an oral examination, tooth shade measurement, and a subjective evaluation. During the oral examination, the patient's oral health status was determined. ShadeEye NCC and Vita classical shade guide were used to determine the tooth color. Further, the patients were asked to assess the color of their own teeth using a visual analog scale (VAS) scale (range, 1-5). RESULTS: According to the CIELAB system, a significantly greater color change (Deltab*) was observed in the hydrogen peroxide group (2.10+/-1.54) than in the hydroxyapatite (1.50+/-1.09) and control (0.94+/-0.75) groups after 3 months of toothpaste usage (P0.05). The subjective evaluation results of the hydroxyapatite (P=0.023) and hydrogen peroxide (P=0.047) groups were statistically significant at each time point. CONCLUSIONS: The hydrogen peroxide-containing toothpaste caused significant lightening of tooth coloration than the hydroxyapatite and placebo toothpastes.