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J Dent Med-tums 2025, 38 - : 0-0 |
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Biuki N, Aghaali M, Jahangir A, Saleh A, Pourabdollahi M, Mehdipour A. Evaluation of diagnostic accuracy of panoramic radiography according to cone beam computed tomography in the detection of relationship between mandibular third molar teeth and inferior alveolar nerve. J Dent Med-tums 2025; 38 : 9
URL: http://jdm.tums.ac.ir/article-1-6314-en.html
URL: http://jdm.tums.ac.ir/article-1-6314-en.html
Nima Biuki1 
, Mohammad Aghaali2 , Allahyar Jahangir3 , Ali Saleh4 , Mahboubeh Pourabdollahi5 , Aida Mehdipour *6
, Mohammad Aghaali2 , Allahyar Jahangir3 , Ali Saleh4 , Mahboubeh Pourabdollahi5 , Aida Mehdipour *6
1- Qom university of medical sciAssistant Professor, Oral and Maxillofacial Radiology Department, School of Dentistry, Qom University of Medical Sciences, Qom, Iranences
2- Assistant Professor, Department of Community Medicine, School of Medicine, Qom University of Medical Sciences, Qom, Iran
3- Member of Student Research Committee, Qom university of Medical Sciences, Qom, Iran
4- Member of Cellular and Molecular Research Center, Qom University of Medical Sciences, Qom, Iran
5- Assistant Professor, Oral and Maxillofacial Radiology Department, School of Dentistry, Qom University of Medical Sciences, Qom, Iran
6- Associate Professor, Department of Pediatric Dentistry, School of Dentistry, Qom University of Medical Sciences, Qom, Iran; Member of Research Center, Qom University of Medical Sciences, Qom, Iran
2- Assistant Professor, Department of Community Medicine, School of Medicine, Qom University of Medical Sciences, Qom, Iran
3- Member of Student Research Committee, Qom university of Medical Sciences, Qom, Iran
4- Member of Cellular and Molecular Research Center, Qom University of Medical Sciences, Qom, Iran
5- Assistant Professor, Oral and Maxillofacial Radiology Department, School of Dentistry, Qom University of Medical Sciences, Qom, Iran
6- Associate Professor, Department of Pediatric Dentistry, School of Dentistry, Qom University of Medical Sciences, Qom, Iran; Member of Research Center, Qom University of Medical Sciences, Qom, Iran
Abstract: (1138 Views)
Background and Aims: Third molar teeth extraction is one of the common treatments procedure in dentistry. The proximity of mandibular third molar teeth to the inferior alveolar nerve canal may make the surgery challenging and cause adverse complications. The purpose of this study was to determine the accuracy of diagnostic and evaluation of panoramic radiography findings in two classification methods (Rood-Shehab and Tanaka) according to CBCT in mandibular third molar extraction surgery.
Materials and Methods: This cross-sectional analytical study was conducted on 65 patients of a private radiology clinic in Qom who had simultaneous panoramic and CBCT radiography. Panoramic and CBCT radiographs were imported into Scanora and Ondemand softwares, respectively. The relation of the mandibular third molar with the inferior alveolar nerve was evaluated according to Tanaka's classification and Rood-Shehab radiographic signs and compared with CBCT radiographs. Finally, the obtained data were analyzed by chi-square test, ROC curve and SPSS software version 24. The significant level was considered at P<0.05.
Results: Out of 65 samples, 23.1% were men and 76.9% were women. The mean age of participants was 26.9±8.77. There was a significant relation between the Tanaka's classification of panoramic radiographs and proximity to the nerve in CBCT radiographs (P=0.011). This relationship was significant when the number of radiographic signs of the Rood-Shehab classification increased (P=0.044). Root darkening and diversion of mandibular nerve canal signs of Rood-Shehab classification showed more diagnostic accuracy in the nerve canal contact determination than that of other signs.
Conclusion: The probability of contact of third molar root with the inferior alveolar nerve canal increases with increasing in the number of Rood-Shehab radiographic signs. The root darkening sign was more accurate and followed by mandibular canal diversion sign. Tanaka’s classification can be used in differentiating cases without contact to the nerve canal.
Materials and Methods: This cross-sectional analytical study was conducted on 65 patients of a private radiology clinic in Qom who had simultaneous panoramic and CBCT radiography. Panoramic and CBCT radiographs were imported into Scanora and Ondemand softwares, respectively. The relation of the mandibular third molar with the inferior alveolar nerve was evaluated according to Tanaka's classification and Rood-Shehab radiographic signs and compared with CBCT radiographs. Finally, the obtained data were analyzed by chi-square test, ROC curve and SPSS software version 24. The significant level was considered at P<0.05.
Results: Out of 65 samples, 23.1% were men and 76.9% were women. The mean age of participants was 26.9±8.77. There was a significant relation between the Tanaka's classification of panoramic radiographs and proximity to the nerve in CBCT radiographs (P=0.011). This relationship was significant when the number of radiographic signs of the Rood-Shehab classification increased (P=0.044). Root darkening and diversion of mandibular nerve canal signs of Rood-Shehab classification showed more diagnostic accuracy in the nerve canal contact determination than that of other signs.
Conclusion: The probability of contact of third molar root with the inferior alveolar nerve canal increases with increasing in the number of Rood-Shehab radiographic signs. The root darkening sign was more accurate and followed by mandibular canal diversion sign. Tanaka’s classification can be used in differentiating cases without contact to the nerve canal.
Article number: 9
Type of Study: Applicable |
Subject:
oral and maxillofacial Radiology
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