Dental anomalies in shape and number may be present isolated or associated with other manifestations. In anhidrotic
ectodermal dysplasia they occur more frequently and severely. The authors examined a group of children with similar dental anomalies
but no other ectodermal or extra-ectodermal signs.
This study makes a comparative evaluation of similarities and
differences of dental anomalies between two groups: A anhidrotic ectodermal dysplasia and B similar dental finding but without extra-
In group A, the average number of agenesis in primary teeth was 3.5 (upper) and 5.33 (lower); in
permanent teeth it was 5.4 and 5.8, respectively. In group B, the average was 1.62 (upper) and 0.25 (lower) in primary teeth, and 4.0
and 4.25 in permanent teeth respectively, with no constant pattern of occurrence. The study of tooth morphology of both groups
revealed numerous anomalies in both dentitions. No differences were found in the average number of agenesis and morphological
anomalies in the permanent teeth between both groups, but in the primary dentition group B presented a lower degree of incidence.
The presence of almost normal primary dentition (regarding to number), but with morphological anomalies, should lead
to suspect their exacerbation in the permanent dentition.
Vol.7 – n.3/2006
Harvard: E. Barbera, D. Saavedra, M. Arenas, M. Maroto (2006) "Multiple agenesis and anhidrotic ectodermal dysplasia: a comparative longitudinal study of dental similarities and genetic differences in two groups of children", European Journal of Paediatric Dentistry, 7(3), pp113-121. doi:
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