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Transverse dental changes after tooth-borne and bone-borne maxillary expansion
Manuel O Lagravère1, Jennifer Gamble, Paul W Major
1Faculty of Medicine and Dentistry, 11405-87, avenue NW, Edmonton ABT6G1C9, Canada.
International Orthodontics
|February 5, 2013
Summary
Maxillary expansion treatments cause dental tipping in molars for both bone-anchored and tooth-anchored methods. Premolars showed tipping only with tooth-anchored rapid maxillary expansion (RME). Asymmetry was not significant in either group.
Area of Science:
- Dentistry
- Orthodontics
- Craniofacial Biology
Background:
- Maxillary expansion is a common orthodontic treatment.
- Understanding skeletal versus dental changes is crucial.
- Assessing treatment-specific dental tipping is important.
Purpose of the Study:
- To compare skeletal and dental maxillary expansion.
- To evaluate the degree and symmetry of dental tipping.
- To differentiate outcomes between bone-anchored and tooth-anchored RME.
Main Methods:
- Sixty-two patients undergoing maxillary expansion were randomized into three groups.
- Cone-beam computed tomography (CBCT) scans were taken over one year.
- Statistical analysis included MANOVA and ANOVA to assess dental inclination and asymmetry.
Main Results:
- Both bone-anchored and tooth-anchored RME showed significant molar dental tipping compared to controls.
- Tooth-anchored RME, but not bone-anchored RME, resulted in significant premolar tipping.
- No significant asymmetry in dental inclination was observed across groups or time.
Conclusions:
- Dental tipping occurs in molars with both RME approaches.
- Premolar tipping is more pronounced with tooth-anchored RME.
- Current methods do not show significant asymmetry in dental tipping post-RME.
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