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CBCT assessment of alveolar buccal bone level after RME.
Valmy Pangrazio-Kulbersh1, Brynn Jezdimir, Mariana de Deus Haughey
1Department of Orthodontics, University of Detroit Mercy, Detroit, MI 48208, USA.
The Angle Orthodontist
|September 6, 2012
Summary
Maxillary expansion using banded or bonded expanders resulted in horizontal buccal bone loss. Vertical bone loss was minimal and only significant in the banded group for specific teeth.
Area of Science:
- Orthodontics
- Dental Imaging
- Periodontal Health
Background:
- Rapid maxillary expansion is a common orthodontic procedure.
- Maintaining alveolar bone support during expansion is crucial for long-term stability.
- Different expander types may influence bone remodeling outcomes.
Purpose of the Study:
- To compare maxillary alveolar buccal bone levels after expansion with banded versus bonded expanders.
- To evaluate bone thickness and marginal bone level changes using cone-beam computed tomography (CBCT).
Main Methods:
- A comparative study involving 22 patients undergoing maxillary expansion.
- Two groups: bonded hygienic expanders (n=10) and banded hyrax expanders (n=12).
- CBCT scans before and 6 months after expansion to measure buccal bone thickness (BT), marginal bone level (MBL), and bone thickness level (BTL).
Main Results:
- No significant differences in bone levels were found between the bonded and banded expander groups.
- Horizontal buccal bone thickness (BT) significantly decreased in both groups post-expansion.
- Average horizontal bone loss ranged from -0.50 mm to -0.72 mm.
Conclusions:
- Both banded and bonded expanders lead to similar outcomes regarding buccal bone changes.
- Minimal vertical bone loss (MBL) was observed, with significance only in the banded group for specific molars and premolars.
- The findings suggest comparable effects of both expander types on alveolar bone during maxillary expansion.
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