Browse > Article
http://dx.doi.org/10.5624/isd.2013.43.2.105

Comparison of panoramic radiography with cone beam CT in predicting the relationship of the mandibular third molar roots to the alveolar canal  

Shahidi, Shoaleh (Biomaterial Research Center, Department of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences)
Zamiri, Barbod (Department of Oral and Maxillofacial Surgery, School of Dentistry, Shiraz University of Medical Sciences)
Bronoosh, Pegah (Department of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences)
Publication Information
Imaging Science in Dentistry / v.43, no.2, 2013 , pp. 105-109 More about this Journal
Abstract
Purpose: Preoperative radiographic assessment of the mandibular third molars is essential to prevent inferior alveolar nerve damage during extraction. The purpose of this study was to assess the reliability of panoramic signs of association between the roots of teeth and the canal, and to compare the panoramic signs with cone beam computed tomography (CBCT) findings. Materials and Methods: CBCT images of 132 impacted mandibular third molars were evaluated to determine the association of the root to the canal. The CBCT findings were compared with the corresponding panoramic images. Logistic regression analysis was used to define the diagnostic criteria of the panoramic images. Results: Among the panoramic signs, loss of the cortical line was the most frequent radiographic sign predicting association (sensitivity: 79.31). Contact of the tooth with the canal was observed in all cases in which the loss of cortical line of the canal or darkening of the roots was found on the panoramic radiographs. Conclusion: Darkening of the roots and loss of the cortical line on panoramic radiographs might be highly suggestive of the risk of nerve injury.
Keywords
Cone-Beam Computed Tomography; Radiography; Panoramic; Molar; Third; Mandibular Nerve;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Ahmad M, Jenny J, Downie M. Application of cone beam computed tomography in oral and maxillofacial surgery. Aust Dent J 2012; 57 Suppl 1: 82-94.   DOI
2 Nakagawa Y, Ishii H, Nomura Y, Watanabe NY, Hoshiba D, Kobayashi K, et al. Third molar position: reliability of panoramic radiography. J Oral Maxillofac Surg 2007; 65: 1303-8.   DOI
3 Nakayama K, Nonoyama M, Takaki Y, Kagawa T, Yuasa K, Izumi K, et al. Assessment of the relationship between impacted mandibular third molars and inferior alveolar nerve with dental 3-dimensional computed tomography. J Oral Maxillofac Surg 2009; 67: 2587-91.   DOI
4 Blaeser BF, August MA, Donoff RB, Kaban LB, Dodson TB. Panoramic radiographic risk factors for inferior alveolar nerve injury after third molar extraction. J Oral Maxillofac Surg 2003; 61: 417-21.   DOI
5 Tyndall DA, Kohltfarber H. Application of cone beam volumetric tomography in endodontics. Aust Dent J 2012; 57 Suppl 1: 72-81.   DOI
6 Jung YH, Nah KS, Cho BH. Correlation of panoramic radiographs and cone beam computed tomography in the assessment of a superimposed relationship between the mandibular canal and impacted third molars. Imaging Sci Dent 2012; 42: 121-7.   DOI
7 Sedaghatfar M, August MA, Dodson TB. Panoramic radiographic findings as predictors of inferior alveolar nerve exposure following third molar extraction. J Oral Maxillofac Surg 2005; 63: 3-7.
8 Monaco G, Montevecchi M, Bonetti GA, Gatto MR, Checchi L. Reliability of panoramic radiography in evaluating the topographic relationship between the mandibular canal and impacted third molars. J Am Dent Assoc 2004; 135: 312-8.   DOI
9 de Melo Albert DG, Gomes AC, do Egito Vasconcelos BC, de Oliveira e Silva ED, Holanda GZ. Comparison of orthopantomographs and conventional tomography images for assessing the relationship between impacted lower third molars and the mandibular canal. J Oral Maxillofac Surg 2006; 64: 1030-7.   DOI
10 Neves FS, Souza TC, Almeida SM, Haiter-Neto F, Freitas DQ, Boscolo FN. Correlation of panoramic radiography and cone beam CT findings in the assessment of the relationship between impacted mandibular third molars and the mandibular canal. Dentomaxillofac Radiol 2012; 41: 553-7.   DOI
11 Bell GW. Use of dental panoramic tomographs to predict the relation between mandibular third molar teeth and the inferior alveolar nerve. Radiological and surgical findings, and clinical outcome. Br J Oral Maxillofac Surg 2004; 42: 21-7.   DOI
12 Tantanapornkul W, Okochi K, Bhakdinaronk A, Ohbayashi N, Kurabayashi T. Correlation of darkening of impacted mandibular third molar root on digital panoramic images with cone beam computed tomography findings. Dentomaxillofac Radiol 2009; 38: 11-6.   DOI
13 Gomes AC, Vasconcelos BC, Silva ED, Caldas Ade F Jr, Pita Neto IC. Sensitivity and specificity of pantomography to predict inferior alveolar nerve damage during extraction of impacted lower third molars. J Oral Maxillofac Surg 2008; 66: 256-   DOI
14 Tay AB, Go WS. Effect of exposed inferior alveolar neurovascular bundle during surgical removal of impacted lower third molars. J Oral Maxillofac Surg 2004; 62: 592-600.   DOI
15 Ferretti F, Malventi M, Malasoma R. Dental magnetic resonance imaging: study of impacted mandibular third molars. Dentomaxillofac Radiol 2009; 38: 387-92.   DOI