Thesis
CBCT analyses of maxillary sinus volume and maxillary size in subjects with and without dental impactions
University of Iowa
Master of Science (MS), University of Iowa
Spring 2020
DOI: 10.17077/etd.005357
Abstract
Introduction: Subjects with maxillary sinus (MS) aplasia show reduced malar prominence suggesting that MS growth may play a role in determining maxillary size. The aim of this retrospective study was to compare the MS volume (MSV), maxillary size/sagittal position, and the association between the two in subjects with bilateral impacted teeth and no impacted teeth.
Materials and Methods: The study consisted of two groups, an impaction group (n=38) and non-impaction group (n=38). The MSV was calculated from CBCTs using Dolphin Software. The maxillary size and position were calculated from orthogonal Lateral Cephalograms. We performed Wilcoxon rank sum or signed rank test to analyze maxillary sinus volume and maxilla size and sagittal position between groups, and Pearson’s correlation to analyze associations between MSV and maxilla size and sagittal position.
Results: Though not statistically significant, the MSV showed a trend of smaller volume in the impacted group compared to non-impacted group. The length of the maxillae and length of the midface showed a trend at being larger in the non-impaction group. Also, there was a statistically significant association between MSV and maxilla size in the non-impacted group.
Conclusions: Based on the study results we speculate that MS could play a role in determining maxillary size, however the study must be repeated with larger sample size.
Details
- Title: Subtitle
- CBCT analyses of maxillary sinus volume and maxillary size in subjects with and without dental impactions
- Creators
- Andrew Richter
- Contributors
- Shankar Rengasamy Venugopalan (Advisor)Steven D Marshall (Committee Member)Kyungsup Shin (Committee Member)Trishul V Allareddy (Committee Member)
- Resource Type
- Thesis
- Degree Awarded
- Master of Science (MS), University of Iowa
- Degree in
- Orthodontics
- Date degree season
- Spring 2020
- DOI
- 10.17077/etd.005357
- Publisher
- University of Iowa
- Number of pages
- vii, 44 pages
- Copyright
- Copyright 2020 Andrew Richter
- Language
- English
- Description illustrations
- color illustrations
- Description bibliographic
- Includes bibliographical references (pages 43-44).
- Public Abstract (ETD)
Individuals that lack a maxillary sinus show a reduced prominence in the area of the cheeks suggesting that the maxillary sinus growth could play a role in the size of the upper jaw. The aim of this study was to compare the maxillary sinus volume (MSV), upper jaw size and sagittal position, and the association between the two in subjects with impacted teeth on both sides of the upper jaw and no impacted teeth.
The study consisted of two groups, an impaction group (n=38) and non-impaction group (n=38). The MSV was calculated on Cone Beam Computed Tomography using Dolphin Software. The upper jaw size/position were calculated from x-rays taken from a sagittal view of the subject’s head. We compared maxillary sinus volume and upper jaw size and position between groups, and evaluated both groups to investigate whether there were associations between MSV and upper jaw size and position.
The MSV showed a trend of smaller volume in the impacted group compared to non-impacted group. The upper jaw length and midface length showed a trend at being larger in the non-impaction group. Also, there was a strong association between MSV and upper jaw size in the non-impacted group.
Based on the study results we speculate that the maxillary sinus could play a role in determining upper jaw size, however the study must be repeated with a larger sample size.
- Academic Unit
- Orthodontics; Craniofacial Anomalies Research Center
- Record Identifier
- 9983956196502771
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