Management of Two Cases of Supernumerary Teeth.

Supernumerary teeth are commonly observed as an isolated developmental anomaly. While the familial tendency of supernumerary teeth has been documented, its genetic causality has not yet been determined. The purpose of this paper was to presents two cases with supernumerary teeth and the process leading to the diagnosis and determination of their underlying conditions. Cases were evaluated and family histories reviewed. Genetic counseling was recommended for the probands and followed by genetic testing of selected family members. The proband of family one, who has multiple supernumerary teeth, was determined to have a RUNX2 missense mutation (c.379C>T, p. Pro127Ser) and diagnosed with cleidocranial dysplasia. The proband of family two, who has a premolar region supernumerary tooth, was reported to have no bone defects also presented with a RUNX2 missense mutation (c.1381G>C, p. Gly461Arg). When patients present with multiple supernumerary teeth, a recommendation and guidance to genetic counseling and testing may facilitate accurate diagnosis and management.