MIRROR-IMAGE DENTAL FUSION AND DISCORDANCE IN MONOZYGOTIC TWINS

A pair of monozygotic twins had similar but not identical dental anoma lies. One twin had fusion of deciduous mandibular lateral incisor and canine on the left, with normal dentition on the right; the co-twin ha d right mandibular incisor/canine fusion, with aplasia of the lateral incisor on the left. These findings are discussed in the context of th e related phenomena of situs inversus, mirror-imaging in twins, and gr adients of severity of anomalies in the four copies of the mandibular developmental dental field. (C) 1994 Wiley-Liss, Inc.