NON-SYNDROMIC FAMILIAL SUPERNUMERARY TEETH: CASE REPORT AND REVIEW OF THEIR PHENOTYPIC CHARACTERISTIC

Supernumerary teeth have a genetic predisposition with a predilection for males. This article reports an uncommon radiological finding in a non-syndromic sibling pair who presented with supernumerary teeth of different morphologies on opposite and different regions of the dental arches. A 14-year-old Chinese male presented with a conical supernumerary palatally placed between the upper right central and lateral incisors. His older brother had unerupted bilateral supplemental supernumerary teeth between the roots of the lower second premolars and first permanent molars. Trends of the phenotypic presentation of familial non-syndromic supernumerary cases are discussed. Familial supernumerary teeth have been suggested to be due to autosomal dominance or recessive traits. Variation in the numeral, spatial and morphological phenotypic expressions suggests a multifactorial model of multiple genetic, epigenetic and environmental influences. Clinicians need to be mindful of the possible phenotypic variations that may present when treating cases with family history of dental anomalies.