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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

Erschienen in:

29.09.2021 | Original Article

Differences in third molar development and angulation in class II subdivision malocclusions

verfasst von: Assistant Prof. Ezgi Sunal Akturk, DDS,DS, Assistant Prof. Elif Dilara Seker, Sena Akman, Prof. Gokmen Kurt

Erschienen in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie | Ausgabe 4/2023

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Abstract

Purpose

To assess and compare the developmental stages and angulations of third molars between the class II and class I sides in class II subdivision malocclusions.

Methods

This retrospective study was performed using panoramic x‑rays of 38 individuals (mean age: 15.5 years; 24 females, 14 males) with class II subdivision malocclusions, which were further divided into type 1 and 2 subgroups according to midline deviation, and a control group of 42 individuals (mean age: 17.0 years; 30 females, 12 males) with normal occlusion. Third molars were categorized using the developmental stages defined by the Demirjian method. Angles between the third molars and horizontal reference lines and also to the second molars were measured.

Results

No difference was found in developmental stages or angulations between the left and right third molars in the control group. In the class II subdivision malocclusion cases, no difference in third molar developmental stages was observed, but the angle between the long axes of the mandibular third and second molars was significantly greater on the class II side. In the type 2 subgroup, developmental stage of the maxillary third molar was more advanced on the class II side. In both subgroups, the angles of the maxillary third molars’ long axis to the interorbital plane differed significantly between the two sides.

Conclusion

Class II subdivision malocclusion may cause differences in third molar development and angulations between the two sides. Orthodontic treatment should be planned considering the third molars in this malocclusion.

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Titel: Differences in third molar development and angulation in class II subdivision malocclusions
verfasst von: Assistant Prof. Ezgi Sunal Akturk, DDS,DS
Assistant Prof. Elif Dilara Seker
Sena Akman
Prof. Gokmen Kurt
Publikationsdatum: 29.09.2021
Verlag: Springer Medizin
Erschienen in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie / Ausgabe 4/2023
Print ISSN: 1434-5293
Elektronische ISSN: 1615-6714
DOI: https://doi.org/10.1007/s00056-021-00349-4

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Differences in third molar development and angulation in class II subdivision malocclusions