Child 2 DMF Index 2 Dental Caries 2 Dental caries 2 Humans 2 Mathematical physics 2 child 2 dental caries 2 human 2 Action research 1 Adolescent 1 Arab 1 Arabs 1 Auckland 1 Block rate 1 Board 1 Budget control 1 Collaboration 1 Critical Regionalism 1 Cutoff frequency 1 DMF index 1 Developed Countries 1 Developing Countries 1 Dietary Sucrose 1 Difference-in-difference 1 Difference-in-differences 1 Differences-in-differences 1 Directors 1 Elasticity 1 Electric power utilization 1