Author(s):
Ochoa-Rodríguez, Victor Manuel [UNESP] ; Wilches-Visbal, Jorge Homero ; Roma, Barbara [UNESP] ; Coaguila-Llerena, Hernán [UNESP] ; Tanomaru-Filho, Mário [UNESP] ; Gonçalves, Andréa [UNESP] ; Spin-Neto, Rubens ; Faria, Gisele [UNESP]
Date: 2020
Persistent ID: http://hdl.handle.net/11449/200808
Origin: Oasisbr
Subject(s): Dental; Dental cements; Digital; Endodontics; Materials testing; Radiography; Radiology; Dental; Dental; Dental cements; Dental cements; Digital; Digital; Endodontics; Endodontics; Materials testing; Materials testing; Radiography; Radiography; Radiology; Radiology
Description
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The aims of the present study were to compare conventional radiography, radiographs digitized with a scanner or photographic camera, and digital radiography, used to evaluate the radiopacity of endodontic materials, and to compare the accuracy of linear and quadratic models used to convert radiopacity values to equivalent millimeters of aluminum (mm Al). Specimens of AH Plus, Endofill, Biodentine and BioMTA materials (n = 8) were radiographed next to an aluminum step-wedge using radiographic films and digital radiography systems (FONA CMOS sensor, Kodak CMOS sensor and photosensitive phosphor plate-PSP). Conventional radiographs were digitized using a scanner or photographic digital camera. Digital images of all the radiographic systems were evaluated using dedicated software. Optical density units (ODU) of the specimens and the aluminum step-wedge were evaluated by a photo-densitometer (PTDM), used in conventional radiographs. The radiopacity in equivalent mm Al of the materials was determined by linear and quadratic models, and the coefficients of determination (R2) values were calculated for each model. Radiopacity of the materials ranged from-9% to 25% for digital systems and digitized radiographs, compared to the PTDM (p < 0.05). The R2 values of the quadratic model were higher than those of the linear model. In conclusion, the FONA CMOS sensor showed the lowest radiopacity variability of the methodologies used, compared with the PTDM, except for the BioMTA group (higher than PTDM). The quadratic model showed higher R2 values than the linear model, thus indicating better accuracy and possible adoption to evaluate the radiopacity of endodontic materials.
Universidade Estadual Paulista-Unesp Araraquara School of Dentistry Department of Restorative Dentistry
University of Magdalena School of Oral Sciences Department of Dentistry
Universidade Estadual Paulista-Unesp Araraquara School of Dentistry Department of Oral Diagnosis and Surgery
Aarhus University School of Health Department of Dentistry and Oral Health
Universidade Estadual Paulista-Unesp Araraquara School of Dentistry Department of Restorative Dentistry
Universidade Estadual Paulista-Unesp Araraquara School of Dentistry Department of Oral Diagnosis and Surgery
