Worldwide Variations in Methodology and Reporting of Early Childhood Caries: A Scoping Review.

Purpose: The purpose of this study was to identify the variations in the definition, diagnostic criteria, and clinical study methods regarding early childhood caries (ECC) in preschool children or children younger than six years old. Methods: This is a scoping review of ECC studies published from January 1999 to December 2019. Extracted information from 256 studies included the year of publication, country/city of the studied population, nomenclature used, diagnostic criteria, and case definition. Results: The number of published studies was greatest in the past five years. Thirteen different methods for diagnosis of ECC were identified, with World Health Organization criteria being the most frequently used. The nomenclature "dental caries in primary teeth" remained the most popular terminology to describe caries in preschool children, followed by ECC. The threshold for determining caries ranged from visual observation of dental caries to a full range of clinical and radiographic findings. Conclusions: There is a wide variation in diagnostic criteria and case definitions of early childhood caries. Global consensus would advance the understanding, epidemiology, burden, and management of ECC.