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

Clinical Oral Investigations volume 25, pages833–839(2021)Cite this article

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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Funding

The work was supported by the Pediatric Dental Clinic, Barzilai Medical University Center, Ashkelon, Israel.

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Affiliations

  1. Pediatric Dental Unit, Barzilai Medical University Center, Ashkelon, Israel

    Shirley Leibovitz & Uri Zilberman

  2. Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel

    Shirley Leibovitz & Uri Zilberman

  3. Department of Oral Medicine, Sedation & Maxillofacial Imaging, Hebrew University, Hadassah School of Dental Medicine, Jerusalem, Israel

    Yaron Haviv

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  1. Shirley Leibovitz
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  2. Yaron Haviv
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Correspondence to Uri Zilberman.

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Leibovitz, S., Haviv, Y. & Zilberman, U. The effect of Ekman–Westborg and Julin trait (generalized megadontia) and localized megadontia on tooth components size and ion content. Clin Oral Invest 25, 833–839 (2021). https://doi.org/10.1007/s00784-020-03368-4

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Keywords

  • E-WJ trait
  • Megadontia
  • Enamel
  • Dentin
  • Tooth development
  • Ion content