Stoma Edu J. 2021;8(2): pISSN 2360-2406; eISSN 2502-0285 www.stomaeduj.com 106-112 Original Articles ORTHODONTICS CONE BEAM TOMOGRAPHY AND PANORAMIC RADIOGRAPHY IN LOCALIZATION OF IMPACTED MAXILLARY CANINE AND DETECTION OF ROOT RESORPTION Seden Akan 1a* , Husamettin Oktay 2b 1 Department of Orthodontics, Faculty of Dentistry, Altınbaș University, Bakırköy / İstanbul, Turkey 2 Department of Orthodontics, İstanbul Medipol University Faculty of Dentistry, İstanbul, Turkey a DDS, PhD, Assistant Professor; e-mail: sedenakandt@hotmail.com; ORCIDiD: https://orcid.org/0000-0001-7955-3086 b DDS, PhD, Professor; e-mail: hoktay@medipol.edu.tr; ORCIDiD: https://orcid.org/0000-0001-7862-2983 OPEN ACCESS This is an Open Access article under the CC BY-NC 4.0 license. Peer-Reviewed Article Citation: Akan S, Oktay H. Cone beam tomography and panoramic radiography in localization of impacted maxillary canine and detection of root resorption.Stoma Edu J. 2021;8(2):106-112. Received: December 18, 2020; Revised: January 10, 2021; Accepted: January 21, 2021; Published: January 25, 2021 *Corresponding author: Dr. Seden Akan; Altınbaş Üniversitesi Diş Hekimliği Fakültesi Zuhuratbaba Mahallesi, İncirli Caddesi, No:11-A 34147 Bakırköy, İstanbul, Turkey. Tel/Fax: 0090535 5113760; e-mail: sedenakandt@hotmail.com Copyright: © 2021 the Editorial Council for the Stomatology Edu Journal. Introduction The aim of this study was to evaluate cases of impacted maxillary canines (IMC) using cone beam tomography (CBCT) and panoramic images in an attempt to assess if panoramic radiographs can provide information compatible with CBCT results regarding canine position and root resorption. Methodology Fifty-six impacted maxillary canines from 48 patients were radiographically evaluated. The positions of the canine teeth were classifed by Sector localization on panoramic radiographs and the same teeth were also analyzed by KPG on CBCT. Root resorptions in maxillary lateral incisors were also evaluated on CBCT. The relationships between panoramic and CBCT fndings were compared by Chi-square test and Fischer’s exact test. Results Statistically signifcant correlations were found between panoramic Sectors and KPG indexes (p<0.001). KPG index values of 1, 3 and 4 corresponded to the panoramic Sectors 1, 4 and 5, respectively; but KPG index 2 matched the panoramic Sectors 3 and more often 2. Mid-alveolar impaction generally coincided with score 1 for both KPG index and panoramic Sector. In palatally IMC, this score value was generally 2 or 3 for the KPG index and 4 for the panoramic Sector (p≤0.001). Root resorptions in maxillary lateral incisors showed signifcant diferences according to Sector localization and KPG index (p<0.05), namely they coincided with 2 and 3 in Sector evaluation and 2, 3 and 4 in KPG index. Conclusions Sector location on OPG is found to be related to KPG index on CBCT, and it can help evaluate mainly certain positions of impacted canines; thus, unnecessary CBCT scans are not requested. ABSTRACT Impacted Canine; KPG Index; Radiography Dental; Digital Radiography Panoramic; Sector Classifcation. 1. INTRODUCTION Maxillary canines play important roles in facial esthetics, dental arch development, and oral cavity functions. Non-erupted maxillary canines are relatively common because these teeth develop deep within the maxilla and follow a longer path to erupt into the oral cavity when compared to other teeth [1]. An impacted tooth can be defned as the tooth that has failed to erupt into the proper position in the dental arch within the normal period of growth, and maxillary canines are the most common teeth sufering from impaction except third molars. The prevalence of their impaction ran- ges from 1% to 3% in the general population [2-4]. The determination of impacted canine positions is critical for the planning of orthodontic-surgical treatment. The panoramic radiographic evaluation is the most common clinical approach used by or- thodontists for this procedure. It should be known, however, that panoramic radiographs have some limitations in evaluating the labiopalatal positions of impacted canines [5]. In addition, it is difcult to localize and determine the root resorptions of adjacent teeth with this radiographic method because of the superimposition of the related structures, leading to a difculty in distinguishing many signifcant details [6]. Many studies have been carried out to overcome these shortcomings regarding panoramic radiographic KEYWORDS https://doi.org/10.25241/stomaeduj.2020.8(2).art.3 106