Child 1 Dental Caries 1 Dental Health Surveys 1 Female 1 Health Services Needs and Demand 1 Humans 1 Male 1 Oral Health 1 Prevalence 1 Qatar 1 Tooth, Deciduous 1 child 1 deciduous tooth 1 dental caries 1 dental disease assessment 1 dmft 1 epidemiology 1 female 1 health 1 health service 1 human 1 male 1 national survey 1 oral health 1 periodontal health prevalence 1 six-year-old 1