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The multi-detector computed tomographical analysis of bone density in impacted maxillary canines

Authors: Nidhal H. Ghaib نضال حسين غايب --- Nadia B. Al-Ansari
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: 3 Pages: 165-167
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Maxillary canines are important aesthetically and functionally, but impacted canines are more difficultand time consuming to treat, the aim of this study is to investigate with multi-detector computed tomography thecorrelation between the bone density and the upper canine impaction.Material and method: A sample of Unilaterally impacted maxillary canines from 24 patients (19 female, 5 male) whowere referred to accurately localize the impacted canines at al- Karkh general hospital were evaluated by avolumetric 3-d images by the multi-detector computed tomography to accurately measure the bone density of themaxillary cortical palate of the maxillary impacted canine side and compare it with the other side of the normallyerupted canine.Results: The statistical descriptive analysis showed that the ratio of the maxillary canine impaction was higher infemales than in males, also the it revealed that the mean bone density of the cortical bone was greater in themaxillary impacted canine side (affected side) than in the control side (the side of the normally erupted canine), theWilcoxon signed ranks test showed a significant difference in the mean bone density between the affected side andthe control side.Conclusions: The increased bone density of the maxillary cortical plate could be an obstructive factor that causemaxillary canine impaction


Article
Diagnosis and localization of the maxillary impacted canines by using dental multi-slice computed tomography 3D view and reconstructed panoramic 2D view

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Abstract

Background: Diagnosis and treatment planning can be difficult with conventional radiographic methods as the or-thodontic-surgical management of impacted canines requires accurate diagnosis and precise localization of the impacted canine and the surrounding structures. This study was aimed to localize and evaluate weather there is any differences in the diagnostic information provided by multi-slice computed tomography three dimensional volumet-ric CT images and two dimensional reconstructed panorama images (derived from CT) in subjects with impacted maxillary canines.Materials and Methods: Thirty patients including 24 female and 6 male with mean age of 18 years with suspected unilaterally or bilaterally impacted maxillary canines were evaluated on images taken with Brilliance™ 64, Philips mul-ti-detector computed tomography. The spatial relationships of the impacted maxillary canines relative to the adja-cent structures was evaluated using linear and angular measurements, and the adjacent lateral incisor root resorp-tion was assessed with three dimensional and two dimensional visualization software.Results: The inclination of the impacted maxillary canine measured to the midline and to the occlusal plane did not differ significantly when it was evaluated using the two imaging modalities. However, there were significant differ-ences between the 3D and 2D images with respect to the impacted maxillary canine vertical height, bucco-palatal localization, and in detecting the proximity and root resorption of the adjacent lateral incisors.Conclusion: Dental CT volumetric images provide more reliable and accurate information for diagnosing the maxil-lary impacted canine position, inclination, distance from adjacent structures, and detection of lateral incisors rootre-sorption.

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