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Updated: Jun 3, 2026
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Finite Element Analysis Model for Assessing Expansion Patterns from Surgically Assisted Rapid Palatal Expansion
Published on: October 20, 2023
Three-dimensional computerized tomographic orbital volume and aperture width evaluation: a study in patients treated
Edoardo Sicurezza1, Giuseppe Palazzo, Rosalia Leonardi
1Department of Orthodontics, University of Catania, Catania, Italy.
Summary
Rapid maxillary expansion (RME) slightly increases orbital volume and aperture width. These changes are statistically significant but unlikely to alter facial anatomy.
Area of Science:
- Orthodontics
- Craniofacial imaging
- Medical software applications
Background:
- Rapid maxillary expansion (RME) is a common orthodontic procedure.
- Assessing RME's effects on orbital dimensions requires precise measurement techniques.
- Low-dose multidetector computerized tomography (MDCT) offers detailed craniofacial imaging.
Purpose of the Study:
- To evaluate the impact of RME on orbital volume and aperture width.
- To utilize freeware software with DICOM data from low-dose MDCT for measurements.
Main Methods:
- 30 patients underwent RME using a Hyrax Palatal Expander for an average of 18 days.
- Low-dose MDCT scans were taken before (T1) and after (T2) treatment.
- DICOM data was analyzed using OsiriX Medical Imaging software for orbital measurements.
Main Results:
- A significant increase in mean orbital volume from 18.81 cm³ (T1) to 19.53 cm³ (T2).
- A significant increase in mean orbital aperture width from 36.02 mm (T1) to 37.11 mm (T2).
Conclusions:
- RME leads to small but statistically significant increases in orbital dimensions.
- RME does not cause drastic alterations to orbital bone architecture or facial anatomy.
