Child, Preschool 3 Female 3 Humans 3 Male 3 Oral Health female health 3 human 3 male 3 preschool child statistics and numerical data 3 Child 2 DMF Index 2 DMF index 2 Dental Caries 2 Socioeconomic Factors 2 child 2 complication 2 dental caries 2 longitudinal study 2 mouth hygiene 2 questionnaire 2 socioeconomics 2 21-day programme 1 Adolescent 1 Age Factors 1 Analysis of Variance 1 Cross-Sectional Studies 1 Dental Health Surveys 1 Dental Plaque Index 1