Fri, Nov 28, 2025
Volume 14, Issue 2 (8-2025)
2025, 14(2): 35-41 |
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Ethics code: IR.GUMS.REC.1402.400
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Hashemi M, Ranjzad H, Ostovarrad F, Shahmalekpour A O. CBCT Evaluation of Local Anatomical Factors Affecting the Visibility of the Mandibular Canal Roof on Panoramic Radiographs. Journal title 2025; 14 (2) :35-41
URL: http://3dj.gums.ac.ir/article-1-642-en.html
URL: http://3dj.gums.ac.ir/article-1-642-en.html
1- School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
2- Department of Prosthodontics, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
3- Department of Oral and Maxillofacial Radiology, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
4- Department of Oral and Maxillofacial Radiology, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran ,atashahmalakpoor@yahoo.com
2- Department of Prosthodontics, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
3- Department of Oral and Maxillofacial Radiology, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
4- Department of Oral and Maxillofacial Radiology, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran ,
Abstract: (241 Views)
Introduction: Accurate visualization of the mandibular canal (MC) superior border is critical for dental procedures, yet its visibility on panoramic radiographs (PRs) varies due to local anatomical factors. Cone-beam computed tomography (CBCT) was used in this study to compare MC superior border visibility with PRs and assess the impact of local anatomical factors on PR-based visualization.
Materials and Methods: In this cross-sectional study, CBCT scans and PRs of 360 patients (176 males, 184 females; mean age 47.34 ± 13.66 years) obtained between 2021 and 2022 from a private radiology center in Gilan Province, Iran, were analyzed across 360 dental segments at the second premolar, first molar, second molar, and third molar sites. MC superior border visibility on PRs was compared with CBCT, and its association with age, gender, tooth site, gray level, MC superior border–crest distance, buccal cortical plate thickness, and other factors was evaluated using independent t-tests and Chi-square tests (α = 0.05).
Results: MC superior border visibility was significantly higher on CBCT (95.6%) than PRs (84.7%) (P < 0.001), with no difference between sides (P > 0.05). Visibility on PRs was significantly associated with younger age, male gender, third molar site, higher gray level, greater MC superior border-crest distance, and thicker buccal cortical plate (P < 0.05).
Conclusions: CBCT demonstrated higher visibility of the mandibular canal superior border compared with PRs. Limited visibility on PRs, influenced by demographic and anatomical factors, highlights the value of CBCT in cases requiring precise surgical or orthodontic planning.
Materials and Methods: In this cross-sectional study, CBCT scans and PRs of 360 patients (176 males, 184 females; mean age 47.34 ± 13.66 years) obtained between 2021 and 2022 from a private radiology center in Gilan Province, Iran, were analyzed across 360 dental segments at the second premolar, first molar, second molar, and third molar sites. MC superior border visibility on PRs was compared with CBCT, and its association with age, gender, tooth site, gray level, MC superior border–crest distance, buccal cortical plate thickness, and other factors was evaluated using independent t-tests and Chi-square tests (α = 0.05).
Results: MC superior border visibility was significantly higher on CBCT (95.6%) than PRs (84.7%) (P < 0.001), with no difference between sides (P > 0.05). Visibility on PRs was significantly associated with younger age, male gender, third molar site, higher gray level, greater MC superior border-crest distance, and thicker buccal cortical plate (P < 0.05).
Conclusions: CBCT demonstrated higher visibility of the mandibular canal superior border compared with PRs. Limited visibility on PRs, influenced by demographic and anatomical factors, highlights the value of CBCT in cases requiring precise surgical or orthodontic planning.
Type of Study: Original article |
Subject:
Radiology
Received: 2025/05/1 | Accepted: 2025/08/28 | Published: 2025/08/10
Received: 2025/05/1 | Accepted: 2025/08/28 | Published: 2025/08/10
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Co-published by Zamen Salamati.
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