Impact of Dietary Counseling on Efficacy of Tooth Bleaching

Study Overview
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Brief Summary
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The aim of this study will be to evaluate if subjects submitted to a white diet counseling during home dental bleaching will present better results than subjects that maintained their usual diets. Forty patients will be divided into two groups and randomly allocated to each group: usual diet (control) or white diet, avoiding dye-containing food and beverages. patients will be assessed through a food frequency questionnaire and color measurement using a spectrophotometer at baseline and six months after bleaching.

Official Title
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The Impact of Dietary Counseling on the Efficacy of Tooth Bleaching: a Randomized Controlled Trial

Conditions
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Tooth Discoloration

Intervention / Treatment
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* Behavioral: Regular diet


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adults, aged 18 or higher; Central incisors with shade A2 or darker Exclusion Criteria: Undergone previous dental bleaching procedures; Under orthodontic treatment; Pregnant or lactating women.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Placebo Comparator: Regular diet<br> | Behavioral: Regular diet<br>* Patients will not receive any information regarding their usual diet. They will simply perform home dental bleaching.<br>|
| Experimental: White diet<br> | Behavioral: Regular diet<br>* Patients will not receive any information regarding their usual diet. They will simply perform home dental bleaching.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Tooth color | Will be assessed using a spectrophotometer | 6 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Food frequency questionnaire | Patients will respond to a 30 item questionnaire regarding their daily diet. A Food Frequency Questionnaire (FFQ) was constructed to evaluate the consumption of chromogenic food and beverage of patients in the last year. A list of 54 foods and beverages that, according to the literature, have the potential to cause some kind of extrinsic pigmentation, was elaborated. In each food of beverage, the individual will be asked if he consumed in the last year and if the answer is yes, the consumption frequency (0 to 10 times) per unit of time (day, week, month or year). In addition, each individual will answer regarding the amount relative to the mean portion, half of the mean portion, or twice of the mean portion. The size of the mean portions will be considered by calculating the mean of each food consumed. The home measure for the mean portion will be based on the Table of Evaluation of Food Consumption in Home Measures (Pinheiro et al. 2000). | 6 months |