evaluation of radiopacity and microhardness of composites submitted to artificial aging
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ID: 257020
2007
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Abstract
The purpose of this study was to assess the radiopacity and microhardness of different types of resin-based composites (RBC - hybrid; microhybrid; flowable; cement and polyacid modified) before and after being submitted to artificial accelerated aging. Fifty specimens (7 mm in diameter and 2 mm thick) were fabricated, 10 for each material. The specimens were light-cured and submitted to radiopacity and microhardness tests. After obtaining initial radiopacity and microhardness values, the specimens were taken to the artificial accelerated aging, and new measurement of radiopacity and microhardness of the samples was performed. Data were submitted to statistical analysis (Student's t-test - p < 0.05). None of the materials studied showed changes in radiopacity after artificial accelerated aging. There was a significant decrease in microhardness for the microhybrid and polyacid-modified RBC´s. This study suggests that radiopacity remains unaltered after materials are submitted to artificial accelerated aging. Microhardness, however, may vary due to plasticization of the aged RBC matrix.
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cruvinel2007materialsevaluation
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| Authors | ;Diogo Rodrigues Cruvinel;Lucas da Fonseca Roberti Garcia;Luciana Assirati Casemiro;Luiz Carlos Pardini;Fernanda de Carvalho Panzeri Pires-de-Souza |
| Journal | Majalah Ilmiah Teknologi Elektro |
| Year | 2007 |
| DOI |
10.1590/S1516-14392007000300021
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