The development of supernumerary teeth in the mandible in cases with a history of supernumeraries in the pre-maxillary region.

This article presents four cases in which delayed formation and late eruption of supernumerary teeth in the mandible occurred in patients with a history of supernumerary formation in the premaxilla region. In all cases, the premaxillary supernumeraries prevented eruption of the associated permanent incisor(s).