The document discusses early childhood caries (ECC), defining it as a complex dental disease affecting primary teeth, particularly in children under the age of three. It explores the classification of ECC into three types based on severity, prevalence studies that report varying incidence rates, and environmental factors contributing to its development, including feeding practices and socioeconomic status. The document emphasizes the need for preventive measures, including maintaining oral hygiene, dietary recommendations, and the establishment of a dental home.