Adolescent 1 Article 1 Child 1 Child, Preschool 1 DNA determination 1 DNA isolation 1 Dna sequencing 1 Female 1 Genetics 1 Humans 1 Male 1 Mesiodens 1 Pcr 1 Pediatric dentistry 1 Proteins 1 SOSTDC1 gene SOSTDC1 protein, human 1 Tooth, Supernumerary 1 Usag-1 1 adolescent 1 child 1 clinical article 1 controlled study 1 female 1 gene 1 gene expression 1 gene frequency 1 gene mutation 1 genetics 1 human 1