Sensitivity and Specificity of Pantomography to Predict Inferior Alveolar Nerve Damage During Extraction of Impacted Lower Third Molars

Correlation of panoramic radiography and cone beam CT findings in the assessment of the relationship between impacted mandibular third molars and the mandibular canal

“…These findings conform with those in other studies. 5,16,17,21,25,26 The anatomical proximity of the roots of the third molar and the mandibular canal can result in IAN injuries during the extraction of the third molars. To avoid this problem, many studies have proposed risk factors based on the findings of panoramic radiography.…”

“…Knowledge of this relationship Several studies have demonstrated that the presence of two or more signs on a panoramic radiograph indicates an increased risk of IAN exposure 15,18,20,24,27 or injury. 5,16,19,24 However, comparison of CBCT findings with two panoramic radiographic signs in association has not been previously investigated. In the present study, darkening of roots and interruption in white line associated with the absence of corticalization between the mandibular third molar and the mandibular canal in CBCT images were statistically significant, as both isolated findings and in association with each other.…”

“…This indicates that panoramic radiograph does not have a high diagnostic accuracy when used in the assessment of risk in surgical extractions of lower third molars. 5 Cone beam CT (CBCT) is a radiographic method that has been used in several areas of dentistry because it shows three-dimensional (3D) images of dental structures in addition to providing clear structural images with high contrast. It is being used increasingly in many dental specialties, including orthodontics, 6,7 orthognathic surgery 8,9 and implant dentistry.…”

Reliability of Panoramic-Radiograph to Determine the Position of Third-Molar from Inferior-Alveolar-Canal

“…It is recommended in this study to use CBCT as secondary diagnostic modality when panoramic radiograph Gomes et al 2008 Panoramic radiograph does not has a high diagnostic accuracy when it is used in the assessment of risk in surgical extractions of lower third molars Tantanapornkul et al 2007Ghaeminia et al 2011 The diagnostic accuracy of CBCT was superior to panoramic radiography in predicting neurovascular bundle exposure following assessment of the relationship of the third molar root tip to the IAC Hasegawa et al 2013 Panoramic findings mostly inconsistent (62.5%) to CBCT findings. Thus, in planning surgical removal of mandibular third molar, panoramic radiography alone does not provide sufficiently reliable images to assess the risk associated with nerve exposure Peker et al 2014 Less accuracy in panoramic radiograph may indicate further preoperative assessment of impacted mandibular third molar with CBCT especially when darkening of the roots and interruption of the white line are observed on panoramic images shows superimposition of the third molar root on the roof of IAC and the presence of root below the roof of the canal.…”

Difficultés d’avulsion de la troisième molaire mandibulaire incluse : place de l’orthopantomogramme

“…D'autres auteurs trouvent un taux plus élevé pour la radiotransparence. C'est le cas de Monaco [28] (50,68 %) et de Gomes [38] (33,3 %). Selon Kaka [29], le canal mandibulaire est plus souvent en dessous des troisièmes molaires mandibulaires incluses en position horizontale (48 %).…”