Radiopacity evaluation of calcium aluminate cement containing different radiopacifying agents
| Autor: | Hebert Luis Rossetto, Fernanda de Carvalho Panzeri Pires-de-Souza, F. G. Aguilar, Luiz Carlos Pardini, Lucas da Fonseca Roberti Garcia |
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| Rok vydání: | 2010 |
| Předmět: |
Mineral trioxide aggregate
Materials science Guanine Aluminate Radiodensity Oxide Dentistry chemistry.chemical_element Contrast Media Dental Cements Pemetrexed Bismuth Root Canal Filling Materials chemistry.chemical_compound Glutamates Dentin medicine Radiography Dental Humans Composite material Aluminum Compounds Dental Enamel General Dentistry Cement Enamel paint business.industry Calcium Compounds medicine.anatomical_structure chemistry visual_art visual_art.visual_art_medium Zirconium Zinc Oxide business |
| Zdroj: | Journal of endodontics. 37(1) |
| ISSN: | 1878-3554 |
| Popis: | Introduction The aim of this study was to evaluate the radiopacity of calcium aluminate cement (EndoBinder) with 3 different radiopacifiers (bismuth oxide, zinc oxide, or zirconium oxide) in comparison with gray mineral trioxide aggregate (GMTA), white MTA, and dental structures (enamel and dentin). Methods Eighteen test specimens of each cement with thicknesses of 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 mm (n = 3) were made by using a stainless steel matrix and were adapted to a standardizing device (8 × 7 cm) with a graduated aluminum stepwedge varying from 2.0–16.0 mm in thickness. To compare the radiopacity of the cements with that of dental structures, slices of first molars with a thickness increasing from 0.5–3.0 mm were obtained and placed on the standardizing device. One occlusal radiograph for each tested cement was taken, with exposure time of 0.1 seconds and focus-film distance of 20 cm. Films were processed in an automatic device, and the mean radiopacity values were obtained by using a photodensitometer. Results Mean values showed that the thicker the specimen was, the greater was its radiopacity. Only EndoBinder + bismuth oxide (EBBO) and GMTA demonstrated radiopacity values greater than 3.0 mm of the aluminum scale for all thicknesses. When zinc oxide was used as radiopacifier agent, EndoBinder only reached the desired radiopacity with a thickness of 2.0 mm, and with zirconium oxide it was 2.5 mm. Conclusions Bismuth oxide was the most efficient radiopacifier for EndoBinder, providing adequate radiopacity in all studied thicknesses, as recommended by ISO 6876, being similar to GMTA. |
| Databáze: | OpenAIRE |
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