Abstract | INTRODUCTION:
Root resorption resulting from orthodontic treatment is an unpredictable adverse effect. Literature examining the potential protective influence of tooth cementum minerals against orthodontically induced inflammatory root resorption has been sparse. Fluorine could have a role in minimizing the extent and severity of resorptive lesions. The purpose of this study was to examine the elemental content of tooth cementum in orthodontically induced inflammatory root resorption lesions and the effect of systemic fluoride. METHODS: Twenty 7-week-old Wistar rats were divided into 2 groups of 10 and exposed to systemic fluoride (100 ppm) or nonfluoridated drinking water for 2 weeks. Orthodontic tooth movement was implemented with a nickel-titanitum closing coil with a force of 100 g. The molars were then extracted, dissected, and prepared for cross-sectioning through the largest mesial midroot crater. The samples were mounted and scanned by using the Commonwealth Scientific and Industrial Research Organisation and the Australian Research Council's National Key for Geochemical Evolution and Metallogeny of Continents Nuclear Microprobe (Melbourne, Victoria, Australia). Analysis of variance (ANOVA) was used for statistical comparison of the elements and to determine the effect of fluoride, and unaffected tooth structure compared with root resorption craters. The Student t test was used to compare root crater lengths and depths of the fluoride vs no- fluoride groups. RESULTS: CONCLUSIONS: Cementum quality (influenced by systemic fluoride exposure) might impact the extent of orthodontically induced resorptive defects.
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Authors | Elaine Lim, David Belton, Peter Petocz, Manish Arora, Lam L Cheng, M Ali Darendeliler |
Journal | American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics
(Am J Orthod Dentofacial Orthop)
Vol. 139
Issue 2
Pg. e193-202
(Feb 2011)
ISSN: 1097-6752 [Electronic] United States |
PMID | 21300230
(Publication Type: Journal Article)
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Copyright | Copyright © 2011 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved. |
Chemical References |
- Trace Elements
- Sodium
- Zinc
- Fluorides
- Calcium
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Topics |
- Animals
- Calcium
(analysis)
- Dental Cementum
(chemistry, pathology, physiology)
- Female
- Fluoridation
- Fluorides
(administration & dosage, analysis)
- Random Allocation
- Rats
- Rats, Wistar
- Root Resorption
(etiology, pathology, prevention & control)
- Sodium
(analysis)
- Spectrometry, Gamma
- Spectrometry, X-Ray Emission
- Tooth Movement Techniques
(adverse effects)
- Trace Elements
(analysis)
- Zinc
(analysis)
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