Caries severity declined besides persistent untreated primary teeth over a 22-year period: Trends among children in Goiânia, Brazil.

Background: Evidence of time trends in early childhood caries in low- and middle-income countries in the second decade of the year 2000 is scarce.

Aim: To assess the trends in early childhood caries prevalence and severity in 2- to 5-year-old children over a 22-year period (1993-2015) in Goiânia, Midwest Brazil. Additionally, we aimed to investigate the changes regarding affected dental arches and teeth.