Hyperdontia is an odontostomatologic anomaly characterized by an excess in tooth number, both erupted and non-erupted. Hyperdontia is reported quite frequently, predominantly in males (around 2:1) (2) , and it seems to occur more often in patients with hereditary factors concerning this anomaly (6). The prevalence of multiple supernumerary teeth ranges from 8 to 27% of cases (9,12) .
The present case strongly represents those rare forms of hyperdontia with bilateral non-syndromic multiple supernumerary teeth, and with evident penetrance of the phenotype in the family unit engaged in the present study. The karyotype determination is useful for excluding a chromosomal pathogenesis on chromosomal basis.
The value of the present case-report can be used as a paradigm for the assessment of the hereditary factors predisposing the onset of hyperdontia, and for the consequent management of family units in which the odontostomatologic anomaly was detected without any syndromic forms.
Hyperdontia; Supernumerary teeth; Dental Anomalies.