Factors influencing fluoride ingestion from dentifrice by children

Author(s)

Nakai Kobayashi, Claudia Ayumi ^[1] ; Belini, Melina Rodrigues ^[2] ; Italiani, Flavia de Moraes ^[2] ; Colombo Pauleto, Adriana Regina ^[1] ; de Araujo, Juliana Julianelli ^[1] ; Tessarolli, Vanessa ^[1] ; Grizzo, Larissa Tercilia ^[2] ; Pessan, Juliano Pelim ^[2] ; de Andrade Moreira Machado, Maria Aparecida ^[1] ; Rabelo Buzalaf, Marilia Afonso ^[2]

Affiliation

^[1] Univ Sao Paulo, Dept Pediat Dent Orthodont & Publ Hlth, Bauru Dent Sch, Bauru - Brazil

^[2] Univ Sao Paulo, Dept Biol Sci, Bauru Dent Sch, Bauru - Brazil

• Document type: Journal article
• Source: COMMUNITY DENTISTRY AND ORAL EPIDEMIOLOGY; v. 39, n. 5, p. 426-432, OCT 2011.
• Web of Science Citations: 16

Abstract

Objective: This study assessed the percentage of the amount of dentifrice loaded onto the toothbrush that is ingested by children, taking into account age, the amount of dentifrice used during toothbrushing, and the dentifrice flavor. Methods: The sample consisted of 155 children of both genders attending public kindergartens and schools in Bauru, Brazil, divided into 5 groups (n = 30-32) of children aged 2, 3, 4, 5 and 6 years old. The dentifrices used were Sorriso(TM) (1219 ppm F, peppermint-flavored) and Tandy(TM) (959 ppm F, tutti-frutti-flavored). The assessment of fluoride intake from dentifrices was carried out six times for each child, using 0.3, 0.6, and 1.2 g of each dentifrice, following a random, crossover distribution. Brushing was performed by the children or their parents/caregivers according to the home habits and under the observation of the examiner. Fluoride present in the expectorant and on toothbrush was analyzed with an ion-specific electrode after HMDS-facilitated diffusion. Fluoride ingestion was indirectly derived. Results were analyzed by 3-way repeated-measures anova and Tukey's tests (P < 0.05) using the percent dentifrice ingested as response variable. Results: Age and percent dentifrice ingested for both dentifrices, and the three amounts used were inversely related (P < 0.0001). Percent dentifrice ingested was significantly higher after the use of Tandy(TM) under all conditions of the study when compared with Sorriso(TM) (P < 0.0001). Significant differences were observed when brushing with 0.3 g when compared with 1.2 g, for both dentifrices tested (P < 0.05). Conclusions: The results indicate that all variables tested must be considered in preventive measures aiming to reduce the amount of fluoride ingested by young children. (AU)

• FAPESP's process: 08/09059-0 - Evaluation of dentifrice intake by pre-school children from different age ranges
• Grantee: Marília Afonso Rabelo Buzalaf
• Support Opportunities: Regular Research Grants
• FAPESP's process: 09/06336-5 - Evaluation of dentifrice intake by pre-school children from different age ranges
• Grantee: Melina Rodrigues Bellini
• Support Opportunities: Scholarships in Brazil - Scientific Initiation