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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

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20-09-2021 | Original Article

Three-dimensional zygomatic changes after rapid maxillary expansion in growing patients

Authors: Assistant Professor Ufuk Ok, Assistant Professor Emre Kayalar, Assistant Professor Sanaz Sadry

Published in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie | Issue 3/2023

Abstract

Purpose

To assess the effects of rapid maxillary expansion (RME) treatment on the zygomatic bone complex (ZBC).

Methods

In this single-center retrospective study, pre- and posttreatment cone-beam computed tomography (CBCT) images of 38 patients treated with RME were analyzed to investigate changes in the coordinates of the ZBC landmarks. At the start of treatment (T0), the patients’ mean age was 11.1 ± 3.8 years (range 8.3–14.9 years). Cohen’s d test was used to evaluate statistical differences.

Results

There were statistically significant differences between T0 and T1 (P < 0.01) in the measurement values for the maxillary transverse width (ΔT: 3.18 ± 2.58, d: 1.23), frontozygomatic sutures (ΔT: 1.09 ± 0.56, d: 0.43), lowest point of the zygomaticomaxillary sutures (ΔT: 3.16 ± 1.78, d: 0.78), frontomaxillary angular parameter (right side ΔT: 2.81 ± 1.63, d: 1.73; left side ΔT: 2.52 ± 1.20, d: 2.10), frontozygomatic angular parameter (right side ΔT: 2.81 ± 1.63 d: 1.07; left side ΔT: 2.21 ± 2.79, d: 0.61), anterior intermaxillary distance (ΔT: 2.11 ± 1.42, d: 0.99), interzygomaticotemporal distance (ΔT: 2.00 ± 2.42, d: 0.99), and zygomatic angular parameter (right side ΔT: 2.06 ± 1.29, d: 1.6; left side ΔT: 2.02 ± 1.86, d: 1.09).

Conclusions

After RME in growing patients, the zygomatic bone showed pyramidal expansion in the coronal plane and parallel palatal expansion in the axial plane. In addition, significant lateral relocation of the zygomatic bone occurred. The zygomatic bone tended to rotate outward in conjunction with the maxilla, with a typical center of rotation close to the superior side of the frontozygomatic suture. These results shed light on the patterns of skeletal expansion in the zygomatic bone associated with RME in growing patients.

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Title: Three-dimensional zygomatic changes after rapid maxillary expansion in growing patients
Authors: Assistant Professor Ufuk Ok
Assistant Professor Emre Kayalar
Assistant Professor Sanaz Sadry
Publication date: 20-09-2021
Publisher: Springer Medizin
Published in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie / Issue 3/2023
Print ISSN: 1434-5293
Electronic ISSN: 1615-6714
DOI: https://doi.org/10.1007/s00056-021-00348-5

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Three-dimensional zygomatic changes after rapid maxillary expansion in growing patients

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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