Publication: Photoelastic stress analysis of different prefabricated post-and-core materials
Issued Date
2011-10-12
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ISSN
02874547
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2-s2.0-80053581524
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Mahidol University
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SCOPUS
Bibliographic Citation
Dental Materials Journal. Vol.30, No.5 (2011), 684-690
Suggested Citation
Pattapon Asvanund, Steven M. Morgano Photoelastic stress analysis of different prefabricated post-and-core materials. Dental Materials Journal. Vol.30, No.5 (2011), 684-690. doi:10.4012/dmj.2011-043 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/11820
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Title
Photoelastic stress analysis of different prefabricated post-and-core materials
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Abstract
The purpose of this study was to investigate stress developed by a combination of a stainless steel post or a fiber-reinforced resin post with a silver amalgam core or a composite resin core. Two-dimensional photoelastic models were used to simulate root dentin. Posts (ParaPost XT and ParaPost-FiberWhite) were cemented with a luting agent (RelyX Unicem). Silver amalgam cores and composite resin cores were fabricated on the posts. Complete crowns were fabricated and cemented on the cores. Each model was analyzed with 2 force magnitudes and in 2 directions. Fringe orders were recorded and compared using ANOVA (p=0.05) and the Scheffe's test. With vertical force, no stress differences occurred among the 4 groups (p=0.159). With a 30-degree force, there was stress differences among the 4 groups (p < 0.001). The combination of a fiber-reinforced post and composite resin core could potentially reduce stresses within the radicular dentin when angled loads are applied.