Adolescent 1 Child 1 Child, Preschool 1 Children 1 Early extraction 1 Early loss 1 First permanent molar 1 Humans 1 Maxillofacial Development 1 Molar 1 Result or effect of extraction Tooth 1 Tooth Extraction 1 adolescent 1 child 1 growth, development and aging 1 human 1 maxillofacial development 1 molar tooth 1 preschool child 1 surgery 1 tooth 1 tooth extraction 1