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Minerva Stomatologica 2020 June;69(3):148-52

DOI: 10.23736/S0026-4970.19.04286-9

Copyright © 2019 EDIZIONI MINERVA MEDICA

lingua: Inglese

Comparison of two digital intraoral radiography imaging systems as a function of contrast resolution and exposure time

Kader C. AYDIN 1 , Oğuzhan DEMIREL 2, Mutlu ÖZCAN 3

1 Department of Dentomaxillofacial Radiology, School of Dentistry, Istanbul Medipol University, Istanbul, Turkey; 2 Department of Dentomaxillofacial Radiology, School of Dentistry, Istanbul, Turkey; 3 Unit of Dental Materials Unit, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Zürich, Switzerland



BACKGROUND: To compare the image quality of two different digital imaging systems; one photostimulable phosphor plate system (PSP) and a direct digital radiography system with CMOS imaging sensor; via evaluating contrast resolution among four different exposure times.
METHODS: Endodontically treated incisor teeth embedded in paraffin blocks are aligned next to a 99.5% Al wedge and exposed for 0.8, 0.1,0.125 and 0.16 seconds using both the CMOS and PSP systems. Using ImageJ software, 5 isometric and isogridded ROI from each root filling area and isometric ROI from the Al stepwedge were calculated.
RESULTS: Evaluation of the total of 120 images displayed that PSP system produced significantly higher contrast resolution (P<0.05) in regard to pixel values than the CMOS. The CMOS system was non- responsive to increasing dose (P=0.000). Regarding the EqAl values, no significant difference was determined between groups (P>0.05).
CONCLUSIONS: The contrast resolution was higher using the PSP system. It can be estimated that, filling material will be more obvious under lower doses using PSP.


KEY WORDS: Radiography, dental; Technology, radiologic; Diagnostic equipment

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