Evaluation of root resorption following rapid maxillary expansion using cone-beam computed tomography

To evaluate the root resorption after rapid maxillary expansion (RME) via cone-beam computed tomography (CBCT). Records of 25 patients who had undergone RME with tooth-borne banded expander were obtained from the archive of the orthodontic department. CBCT data were reconstructed with surface and vo...

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Bibliographic Details
Published in:The Angle orthodontist 2012-05, Vol.82 (3), p.488-494
Main Authors: Baysal, Asli, Karadede, Irfan, Hekimoglu, Seyit, Ucar, Faruk, Ozer, Törün, Veli, Ilknur, Uysal, Tancan
Format: Article
Language:English
Subjects:
Analysis of Variance
Child
Cone-Beam Computed Tomography
Dental Stress Analysis
Female
Humans
Imaging, Three-Dimensional
Male
Original
Palatal Expansion Technique - adverse effects
Retrospective Studies
Root Resorption - diagnostic imaging
Root Resorption - etiology
Root Resorption - pathology
Subtraction Technique
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Summary:To evaluate the root resorption after rapid maxillary expansion (RME) via cone-beam computed tomography (CBCT). Records of 25 patients who had undergone RME with tooth-borne banded expander were obtained from the archive of the orthodontic department. CBCT data were reconstructed with surface and volume rendering, and the volumetric images were manipulated to display the root surfaces from various orientations. On these three-dimensional images, permanent first molars and first and second premolars were segmented, and their roots were isolated. Volumes of roots were calculated. The difference between pre-expansion and postexpansion root volumes was statistically evaluated with a paired-samples t-test. Also, the percentage of root volume loss was calculated for each root and statistically compared with each other with one-way analysis of variance at the P < .05 level. The difference between the pre-expansion and postexpansion root volumes was statistically significant for all roots investigated. Maximum volume decrease was observed for the mesiobuccal root of first molar teeth (18.60 mm(3)). It was determined that the distobuccal root of first molar teeth was less affected from the expansion procedure (9.47 mm(3)). No statistically significant difference was found for the percentage of root volume loss. Following RME treatment, significant root volume loss was observed for all investigated posterior teeth. However, the percentage of volume loss was not statistically different among roots.
ISSN:0003-3219
1945-7103
DOI:10.2319/060411-367.1