Trends in use of dental services by Brazilian pre-school children considering Age-Period-Cohort Effect.

BACKGROUND: Besides the growth in Brazilian public oral health investments, no pre-school children preventive policies were done, and surveys demonstrated lower prevalences of use of dental service.

AIM: To verify trends in the use, type, and reason for seeking dental services among pre-school children considering time variations.

METHODS: This study used data of clinical examinations and structured interviews of three cross-sectional surveys of southern pre-school children in Brazil, from 2008, 2010, and 2013. Chi-square test for trends and hierarchical age-period-cohort (HAPC) analysis using the multilevel Poisson regression model assessing the influence of social and clinical variables in the use, type, and reason for seeking dental services were performed.

RESULTS: A total of 1765 pre-school children participated in all surveys. At least, one time-related variation affected one of three assessed outcomes. There was no significant change in prevalence of the use of dental services (75.8%, 77.4%, and 74.9%, respectively, for each year; P = 0.750). In the HAPC analysis, younger children and from low socio-economic backgrounds were less likely to have visited the dentist.

CONCLUSION: The prevalence of use of oral health services did not change and socio-economic inequalities persisted through the years, indicating a need of reviewing the policies to promote public health.