Open AccessPrediction of nerve damage by comparing periapical radiographic signs of impacted mandibular third molars in close proximity to inferior alveolar nerve with their true tomographic relationship – An observational study
Author(s) -
Srujana Daniella Remulla,
Jyothirmai Koneru,
Reddy Sudhakara Reddy,
Ramesh Tatapudi,
Geetanjali Darna,
Naga Manikanta Mohan Prathipati
Publication year - 2021
Publication title -
ip international journal of maxillofacial imaging/international journal of maxillofacial imaging/ip international journal of maxillofacial imaging
Language(s) - English
Resource type - Journals
eISSN - 2581-382X
pISSN - 2455-6750
DOI - 10.18231/j.ijmi.2021.023
Subject(s) - cone beam computed tomography , medicine , radiography , mandibular canal , molar , inferior alveolar nerve , dentistry , computed tomographic , root canal , tomography , orthodontics , computed tomography , radiology
The purpose of the study was to correlate the accuracy of Roods and Shehab signs in an intraoral periapical radiograph (IOPAR) with Cone-beam computed tomography (CBCT) findings to indicate Cone-beam computed tomography only in high-risk conditions. 70 impacted mandibular third molar teeth in 58 patients above 18 years with intraoral periapical radiographs presenting with one or more root and canal signs of Rood and Shehab criteria were included in the study. Winter's classification was recorded, and the patients were exposed to a Cone-beam computed tomographic scan. True canal – tooth relationship was assessed in the sectional images. Pearson Chi-square test was used to correlate periapical radiograph and tomographic findings, and an unpaired t-test was applied for descriptive analysis. Rood and Shehab canal criteria in the periapical radiographs were significantly correlated to direct contact of an impacted lower third molar with the canal (p< 0.05) and loss of cortication of Mandibular canal (p< 0.05) on the cone-beam computed tomography. Cone-beam computed tomography is recommended to assess the periapical radiographs with canal risk markers pre-operatively to help avoid iatrogenic complications.