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Clinical Oral Investigations
Published in: Clinical Oral Investigations 3/2021

01-03-2021 | Original Article

The effect of Ekman–Westborg and Julin trait (generalized megadontia) and localized megadontia on tooth components size and ion content

Authors: Shirley Leibovitz, Yaron Haviv, Uri Zilberman

Published in: Clinical Oral Investigations | Issue 3/2021

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Abstract

Aims

The objective of this study is to compare size, enamel thickness and ion relative concentration in generalized megadontia (Ekman- Westborg and Julin trait) and a localized megadont upper third molar to normal teeth.

Materials and methods

The MD dimensions of permanent teeth were compared to controls. Tooth components of molars were measured from X-rays and compared to controls. The enamel and dentin relative amounts of elements of mandibular first permanent molar and deciduous canines of E-WJ trait girl, and megadont upper third molar were determined using ESD program of SEM and compared to match-paired normal teeth.

Results

The teeth of the girl diagnosed with E-WJ trait were true megadont (larger than mean ± 2SD). The ratio of enamel thickness to M-D dimension of molars of E-WJ trait and localized megadontia molars is reduced in comparison with normal similar teeth. In the enamel, carbon and silica concentrations were different in E-WJ trait teeth.

Conclusions

The enamel thickness was reduced in the E-WJ trait and megadont molars, but the relative amount of elements in enamel and dentin was similar to normal. The megadontia is due to a very large tooth germ, as determined by the DEJ, while the ratio of enamel apposition from the total M-D dimension is reduced.

Clinical relevance

Generalized megadontia, as observed in E-WJ trait, is due to large tooth germ, but the enamel thickness is similar to normal. Extractions of permanent teeth are necessary in order to allow normal eruption of teeth.
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Metadata
Title
The effect of Ekman–Westborg and Julin trait (generalized megadontia) and localized megadontia on tooth components size and ion content
Authors
Shirley Leibovitz
Yaron Haviv
Uri Zilberman
Publication date
01-03-2021
Publisher
Springer Berlin Heidelberg
Published in
Clinical Oral Investigations / Issue 3/2021
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI
https://doi.org/10.1007/s00784-020-03368-4

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