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Dentomaxillofacial Radiology (2009) 38, 537-541
© 2009 British Institute of Radiology
doi: 10.1259/dmfr/21071028

RESEARCH

Effect of monitor display on detection of approximal caries lesions in digital radiographs

S Isidor1, M Faaborg-Andersen1, H Hintze1, L-L Kirkevang2, M Frydenberg3, F Haiter-Neto4 and A Wenzel*,1

1Department of Oral Radiology, School of Dentistry, Faculty of Health Sciences, University of Aarhus, Denmark; 2Department of Dental Pathology, Operative Dentistry & Endodontics, School of Dentistry, Faculty of Health Sciences, University of Aarhus, Denmark; 3Department of Biostatistics, Faculty of Health Sciences, University of Aarhus, Denmark; 4Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil

*Correspondence to: A Wenzel, Department of Oral Radiology, School of Dentistry, Faculty of Health Sciences, University of Aarhus, Vennelyst Boulevard, DK-8000 Aarhus C, Denmark; E-mail: awenzel{at}odont.au.dk

Received 2 September 2008; revised 23 September 2008; accepted 6 October 2008


Objectives: The aim was to compare the accuracy of five flat panel monitors for detection of approximal caries lesions.

Methods: Five flat panel monitors, Mermaid Ventura (15 inch, colour flat panel, 1024x768, 32 bit, analogue), Olórin VistaLine (19 inch, colour, 1280x1024, 32 bit, digital), Samsung SyncMaster 203B (20 inch, colour, 1024x768, 32 bit, analogue), Totoku ME251i (21 inch, greyscale, 1400x1024, 32 bit, digital) and Eizo FlexScan MX190 (19 inch, colour, 1280x1024, 32 bit, digital), were assessed. 160 approximal surfaces of human teeth were examined with a storage phosphor plate system (Digora FMX, Soredex) and assessed by seven observers for the presence of caries lesions. Microscopy of the teeth served as validation for the presence/absence of a lesion.

Results: The sensitivities varied between observers (range 7–25%) but the variation between the monitors was not large. The Samsung monitor obtained a significantly higher sensitivity than the Mermaid and Olórin monitors (P<0.02) and a lower specificity than the Eizo and Totoku monitors (P<0.05). There were no significant differences between any other monitors. The percentage of correct scores was highest for the Eizo monitor and significantly higher than for the Mermaid and Olórin monitors (P<0.03).

Conclusions: There was no clear relationship between the diagnostic accuracy and the resolution or price of the monitor. The Eizo monitor was associated with the overall highest percentage of correct scores. The standard analogue flat panel monitor, Samsung, had higher sensitivity and lower specificity than some of the other monitors, but did not differ in overall accuracy for detection of carious lesions.

Keywords: radiography, dental, digital; oral diagnosis; dental caries; intraoral radiography






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