Silver Diamine Fluoride Versus Sodium Fluoride Varnish With Parental Behavior Modification in Arresting Early Childhood Caries

Inclusion Criteria: 1. Children aged ≤ 4 years old. 2. The presence of at least one active carious lesion on a primary tooth, with scores 3 and higher (according to the International Detection and Assessment System- ICDAS II) 3. Children whose caregivers have means of communication (mobile phones). 4. Completion of an informed consent to participate in the study. Exclusion Criteria: 1. Children reporting spontaneous or elicited pain from caries or showing any signs of pulpal infection, swelling and/or abscess. 2. Parental refusal to participate in the study. 3. Allergy or sensitivity to silver or any of the materials included in the study.