Three-dimensional analysis of impacted maxillary third molars: A cone-beam computed tomographic study of the position and depth of impaction

The classification of impacted maxillary third molars (IMTMs) facilitates interdisciplinary communication and helps estimate the degree of surgical difficulty. Thus, this study aimed to develop a 3-dimensional classification of the position and depth of impaction of IMTMs and to estimate their preva...

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Bibliographic Details
Published in:Imaging science in dentistry 2017, 47(3), , pp.149-155
Main Authors: de Andrade, Priscila Ferreira, Silva, Jesca Neftali Nogueira, Sotto-Maior, Bruno Salles, Ribeiro, Cleide Gisele, Devito, Karina Lopes, Assis, Neuza Maria Souza Picorelli
Format: Article
Language:English
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Summary:The classification of impacted maxillary third molars (IMTMs) facilitates interdisciplinary communication and helps estimate the degree of surgical difficulty. Thus, this study aimed to develop a 3-dimensional classification of the position and depth of impaction of IMTMs and to estimate their prevalence with respect to gender and age. This cross-sectional retrospective study analyzed images in sagittal and coronal cone-beam computed tomography (CBCT) sections of 300 maxillary third molars. The proposed classification was based on 3 criteria: buccolingual position (buccal, lingual, or central), mesial-distal position (mesioangular, vertical, or distoangular), and depth of impaction (low, medium, or high). CBCT images of IMTMs were classified, and the associations of the classifications with gender and age were examined using analysis of variance with the Scheffé post-hoc test. To determine the associations among the 3 classifications, the chi-square test was used (
ISSN:2233-7822
2233-7830
DOI:10.5624/isd.2017.47.3.149