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Dentomaxillofacial Radiology (2004) 33, 233-235
© 2004 British Institute of Radiology
doi: 10.1259/dmfr/65487937

RESEARCH

Conventional and digital radiographic methods in the detection of simulated external root resorptions: a comparative study

VPD Westphalen1, I Gomes de Moraes2, FH Westphalen1, WD Martins*,1 and PH Couto Souza1

1 Course of Dentistry, PUC – PR, Curitiba, Brasil; 2 Faculty of Dentistry, USP, Bauru, São Paulo, Brasil

*Correspondence to: Dr WD Martins, Av. República do Líbano, 462 – CEP 82520-500 – Jardim Social, Curitiba – PR – Brazil; Email: w.denis{at}pucpr.br

Received 16 June 2003; revised 20 May 2004; accepted 6 June 2004

Objectives: The purpose of this study was to evaluate and to compare the efficacy of a conventional and a digital radiographic method in diagnosing simulated external root resorption cavities.

Methods: Human dry mandibles containing teeth were covered with bovine muscle slices in order to simulate the soft tissues. Nine teeth from each dental group were investigated. Three periapical radiographs of each tooth were taken in an orthoradial, mesioradial and distoradial aspect using conventional film (Insight Kodak F-speed; Eastman Kodak, Rochester, NY) and a digital sensor (DRS Gnatus System; Gnatus, Ribeirão Preto, Brasil). The teeth were extracted using a forceps and had 0.7 mm and 1.0 mm deep cavities prepared on their vestibular, mesial and distal surfaces at the cervical, middle and apical thirds. Following preparation, each tooth was replaced in its alveolus and new radiographs were taken. Three dental professionals, an endodontist, a radiologist and a general practioner, evaluated the images.

Results: A larger number of cavities (P<0.05) were detected by the digital method when compared with the conventional method, for all depths of lesions.

Conclusions: The results of this study suggest that the digital radiographic method is more sensitive than conventional radiography to detect simulated external root resorption cavities.

Keywords: external root resorption; direct digital radiography; dental radiography






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