Influence of different elastic moduli of dowel and core on stress distribution in root
| Autor: | Hironobu Satoh, Makoto Fujita, Masatsugu Ishikawa, Hiroko Moroi, Shinichi Ukon, Yoshihiro Terada, Kimie Okimoto |
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| Rok vydání: | 2001 |
| Předmět: |
Materials science
Surface Properties Composite number Finite Element Analysis Dental Cements Bending Dowel Composite Resins Models Biological Stress (mechanics) Dental Materials Materials Testing Humans Composite material Tooth Root Pliability General Dentistry Elastic modulus Cement Analysis of Variance Post and core Elasticity Core (optical fiber) Dentin Ceramics and Composites Stress Mechanical Algorithms Dental Alloys Post and Core Technique |
| Zdroj: | Dental materials journal. 19(1) |
| ISSN: | 0287-4547 |
| Popis: | This study was carried out to investigate the influences of elastic moduli of the dowel-core combination on the stress distribution in the root by the use of 2-dimensional finite element analysis. The peak stress at the dowel-cement interface was influenced strongly by a change of elastic modulus of the post (from 20,000 kg/mm2 as a hard prefabricated post to 8,000 kg/mm2 as a custom cast post) for both vertical and 45 degree oblique loading (rho90%). Peak dentinal stress adjacent to the luting cement layer depended only on the post material for vertical loading (rho [symbol: see text] 99%). In contrast, the post and core materials (from 8,000 kg/mm2 as cast core to 300 kg/mm2 as composite resin core) acted in cooperation on the stress magnitude for oblique loading, but the influence of the core material was stronger than that of the post (rho of core [symbol: see text] 41% and rho of post [symbol: see text] 26%). On the other hand, at the marginal region the effect of the core material contributed more than 86% to the peak stress value for both loadings, and the post material affected at most about 11% of the bending resistance. |
| Databáze: | OpenAIRE |
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