Dental and Medical Problems

Dent Med Probl
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ISSN 1644-387X (print)
ISSN 2300-9020 (online)
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Dental and Medical Problems

2018, vol. 55, nr 3, July-September, p. 267–274

doi: 10.17219/dmp/93569

Publication type: original article

Language: English

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Creative Commons BY-NC-ND 3.0 Open Access

Evaluation of the gray level of restorative materials using cone-beam computed tomography: A cross-sectional study

Ocena poziomu szarości materiałów stomatologicznych w tomografii stożkowej – badanie przekrojowe

Pezhman Hadadi1,A, Farzane Ostovarrad2,B, Ava Nikbin2,D,E,F, Hadi Ranjzad3,B, Farzane Ghasemi4,B, Somayeh Nemati2,B

1 Department of Oral and Maxillofacial Radiology, Rasht, Iran

2 Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Guilan University of Medical Sciences, Rasht, Iran

3 Department of Prosthodontics, Faculty of Dentistry, Guilan University of Medical Sciences, Anzali, Iran

4 Department, Faculty of Dentistry, Guilan University of Medical Sciences, Rasht, Iran


Background. Densitometry plays an important role in the diagnosis and treatment planning. Due to diversity in density, equal amounts of different materials absorb various amounts of X-rays and yield different radiographic views.
Objectives. The aim of this study was to evaluate the gray scales of 5 commercially available restorative materials, including amalgam, composite resin, flowable composite resin, glass-ionomer, and Dycal.
Material and Methods. Samples of the 5 test materials from various manufacturers were prepared, each 5-millimeter-thick. There were 7 glass-ionomer samples and 10 of each of the other materials, making a total of 47 samples in the study. The test materials were scanned using a Kodak cone-beam computed tomography (CBCT) unit. Subsequently, the gray scales were determined and evaluated by a radiologist using OnDemand3DTM Dental software and analyzed with SPSS v. 22 software.
Results. Amalgam had a higher gray scale than the other groups of restorative materials. In some cases, it was the same as that of composite resin; however, it was significantly different from gray scales of flowable composite resin, glass-ionomer and Dycal. It was concluded that composite resin and amalgam were high in gray scale, while flowable composite resin, glass-ionomer and Dycal exhibited low gray scales.
Conclusion. Amalgam and composite resin had high gray scales, and glass-ionomer and Dycal exhibited the lowest gray scale values. The findings show that CBCT can be helpful in differentiating amalgam and composite resin from other materials.

Key words

cone-beam computed tomography, dental materials, densitometry

Słowa kluczowe

stożkowa tomografia komputerowa, materiały dentystyczne, densytometria

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