title: Primary and permanent incisor twinning defects in one dental quadrant: report of a case.
authors: C M
authors: CM
authors: Killian
authors: T P
authors: TP
authors: Croll
mesh_terms: D002648:Child; D005671:Fused Teeth / Q000473:pathology*; D006801:Humans; D007180:Incisor / Q000002:abnormalities*; D008297:Male; D008312:Malocclusion, Angle Class II / Q000628:therapy; D008334:Mandible; D014094:Tooth, Deciduous / Q000002:abnormalities*