# Is a White Diet Necessary for Tooth Bleaching Procedures? A Systematic Review and Meta-Analysis

## TL;DR

This study finds that avoiding a 'white diet' during or after tooth bleaching does not significantly affect the outcome of the treatment.

## Contribution

The study provides evidence that dietary restrictions are unnecessary for effective tooth bleaching.

## Key findings

- Dietary restrictions during at-home bleaching showed no significant effect on color change.
- Post-treatment dietary restrictions for in-office bleaching also had no significant impact on results.
- Overall, the study concludes that a white diet is not necessary for successful bleaching.

## Abstract

The aim of this investigation was to conduct a systematic review and meta-analysis to determine the necessity of a white diet during or following a bleaching procedure. This systematic review and meta-analysis followed the PRISMA guidelines meticulously. The research question was: Is a white diet necessary during and/or after a bleaching treatment? In vitro studies or clinical trials reporting the color change in bleached enamel after the use of a free-staining diet were considered for full-text review. For the analyses, a random-effects model was employed. Statistical significance was defined as a p-value < 0.05. A total of 17 documents were eligible for qualitative analysis: 5 clinical trials and 12 in vitro studies. Only data from the clinical trials were included in the meta-analysis. For at-home bleaching, differences in the color among the subjects were not statistically significant during the first (p = 0.64), second (p = 0.26) or third (p = 0.43) weeks of treatment. Also, the color difference one month after finishing the bleaching treatment were not statistically significant (p = 0.27). The color difference one month after finishing an in-office treatment showed that the restrictions on diet did not significantly improve the bleaching outcomes (p = 0.90). According to the findings of this review, dietary restrictions are not necessary during or after bleaching procedures.