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

Martinez, Manuela
Published in European journal of oral sciences. 2008, vol. 116, no. 5, p. 467-72
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.
Keywords AdolescentAdultBicuspid/physiopathologyChildDental Stress AnalysisFemaleHumansImaging, Three-DimensionalLikelihood FunctionsMaleObserver VariationRadiography, Dental, DigitalRoot Resorption/etiology/radiographySensitivity and SpecificityTooth Apex/radiographyTooth Movement/adverse effectsX-Ray MicrotomographyYoung Adult
Stable URL https://archive-ouverte.unige.ch/unige:1434
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PMID: 18821990
Research groups Groupe Kiliaridis Stavros (médecine dentaire) (239)
Groupe Mombelli Andréa (médecine dentaire) (242)
Imagerie et radiologie interventionnelle du foie, des voies biliaires et du pancréas (316)
Groupe Giannopoulou Ekatirini (médecine dentaire) (626)

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Deposited on : 2009-04-28

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