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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie
Published in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie 6/2021

01-11-2021 | Fatigue | Original Article

Effects of Angle class II correction with the Forsus fatigue resistant device on mandibular third molars

A retrospective study

Authors: Belma I. Aslan, PhD DDS, Zühre Z. Akarslan, PhD DDS, Özge Karadağ, PhD

Published in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie | Issue 6/2021

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Abstract

Purpose

The goal was to evaluate the effects of Angle class II malocclusion treatment using the Forsus fatigue resistant device (FRD, 3M, St. Paul, MN, USA) on the position and angulation of mandibular third molars and retromolar space.

Patients and methods

In all, 58 class II patients (mean age 13.6 ± 1.8 years) treated with the FRD (FRD group) were compared with 51 class I patients (mean age 13.5 ± 1.6 years) who underwent orthodontic treatment (control group). A total of 109 mandibular third molars in the FRD group and 91 in the control group were evaluated. Changes in the retromolar space, angulation of the second (ɣ) and third molars (β), and the angle between these teeth (α) were assessed with panoramic radiographs taken at the beginning and the end of the treatment. Data were statistically analyzed.

Results

At the end of the treatment, there were significant increases in ɣ and β in the FRD group and ɣ in the control group (p < 0.05). The decrease in α in the FRD group and increase in the control group were not significant (p > 0.05); however, this change led to a small significant change between the groups (p < 0.05). The retromolar space significantly increased in the FRD group compared to the control group (p < 0.05). No significant correlation was found between retromolar space and third molar uprighting in any of the groups (p > 0.05).

Conclusion

Class II correction with FRD led to mesialization of the lower arch which provided an increase in the retromolar space. Little improvement in the uprighting of the third molars occurred.
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Metadata
Title
Effects of Angle class II correction with the Forsus fatigue resistant device on mandibular third molars
A retrospective study
Authors
Belma I. Aslan, PhD DDS
Zühre Z. Akarslan, PhD DDS
Özge Karadağ, PhD
Publication date
01-11-2021
Publisher
Springer Medizin
Keyword
Fatigue
Published in
Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie / Issue 6/2021
Print ISSN: 1434-5293
Electronic ISSN: 1615-6714
DOI
https://doi.org/10.1007/s00056-021-00281-7

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