Diagnostic accuracy of digitized periapical radiographs validated against micro‐computed tomography scanning in evaluating orthodontically induced apical root resorption

Abstract

The aim of this study was to validate the use of digitized periapical radiographs in evaluating orthodontically induced apical root resorption against micro-computed tomography (micro-CT) scanning as a criterion standard test. In a standardized experimental protocol, 29 premolars in 16 subjects were tipped buccally for 8 wk. Nineteen contralateral premolars not subjected to orthodontic movement served as controls. Standardized periapical radiographs were taken before and after the experimental period (Rx method). These teeth were extracted and scanned using a micro-CT technique with a 9 mum resolution. Two calibrated examiners assessed blindly the presence or absence of apical root resorption on digitized radiographs and three-dimensional reconstructions of the scans. Significant differences were detected between the orthodontically moved teeth and controls: 86% of the orthodontically moved teeth and 21% of the control teeth showed apical root resorption when using micro-CT as a validation method. A total of 55% of the experimental teeth and 5% of the control teeth showed resorption when assessed using Rx method. The Rx method showed a specificity of 78% and a sensitivity of 44%, which means that less than half of the cases with root resorption identified using a CT scanner were identified by radiography. Nearly all the orthodontically moved teeth showed apical root resorption. Apical root resorption may be underestimated when evaluated using digitized periapical radiographs.

Effect of low-intensity pulsed ultrasound on orthodontically induced root resorption caused by torque: A prospective, double-blind, controlled clinical trial

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Cone-beam computed tomography versus periapical radiograph for diagnosing external root resorption: A systematic review and meta-analysis

“…However, recent studies suggested that the diagnosis of ERR using PR could be highly inaccurate. 9 In recent years, cone-beam computed tomography (CBCT) has been widely applied in dental clinics because it enables dental practitioners to visualize the three-dimensional (3D) data and eliminates the structural superimposition. 10 However, the expenses and radiation of CBCT are significantly higher than that of PR.…”

Comparison of Bone Graft Healing Between Autogenous Bone, Blood Clot and Anorganic Bovine Bone Matrix: Radiographic and Histological Analyses

“…Although tomographic tests have a greater resolution and adequately image software analyses, radiographic tests have a similar efficacy for surgery follow-up (Ferrús-Torres et al, 2009). Thus, this research used periapical radiographies because they have a better distortion when compared to other radiographic tests (Dudic et al, 2008) besides providing diagnostic efficacy.…”