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Three-dimensional zygomatic changes after rapid maxillary expansion in growing patients
Ufuk Ok1, Emre Kayalar2, Sanaz Sadry2
1Department of Orthodontics, Faculty of Dentistry, Istanbul Gelisim University, 34310, Avcilar, Istanbul, Turkey. dtufukok@hotmail.com.
Summary
Rapid maxillary expansion (RME) treatment in growing patients causes significant pyramidal and parallel expansion of the zygomatic bone complex (ZBC). The ZBC also showed lateral relocation and outward rotation, influencing facial skeletal development.
Area of Science:
- Orthodontics
- Craniofacial Biology
- Dental Imaging
Background:
- Rapid maxillary expansion (RME) is a common orthodontic treatment to widen the palate.
- The effects of RME on the zygomatic bone complex (ZBC) are not fully understood.
- Understanding ZBC changes is crucial for assessing the overall craniofacial impact of RME.
Purpose of the Study:
- To evaluate the three-dimensional changes in the zygomatic bone complex (ZBC) following rapid maxillary expansion (RME) treatment.
- To investigate the spatial relocation and rotation of the ZBC in response to RME.
- To provide insights into the skeletal adaptations of the midface during RME in growing individuals.
Main Methods:
- Retrospective analysis of cone-beam computed tomography (CBCT) scans from 38 patients treated with RME.
- Measurement of key landmarks on the ZBC before (T0) and after (T1) RME treatment.
- Statistical analysis using Cohen's d test to determine the significance of observed changes.
Main Results:
- Significant increases in maxillary transverse width and anterior intermaxillary distance were observed.
- Statistically significant changes were noted in the frontozygomatic sutures, zygomaticomaxillary sutures, and various angular parameters of the ZBC.
- The zygomatic bone complex exhibited significant lateral relocation and outward rotation, with a center of rotation near the frontozygomatic suture.
Conclusions:
- RME treatment leads to pyramidal expansion of the zygomatic bone in the coronal plane and parallel expansion in the axial plane.
- Significant lateral displacement and outward rotation of the zygomatic bone complex occur during RME.
- These findings elucidate the complex skeletal response of the midface to RME in growing patients.
Keywords:
BiometryCraniofacial suturesOrthodontic appliances, removableOrthodontic treatmentZygomatic boneMore Related Videos
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