Influence of post and resin cement on stress distribution of maxillary central incisors restored with direct resin composite
| Autor: | Aloísio Oro Spazzin, C. A. Garbin, Rodivan Braz, Daniel Galafassi, A. D. de Meira-Júnior |
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| Rok vydání: | 2009 |
| Předmět: |
Periodontium
Materials science Surface Properties Resin composite Glass fiber Finite Element Analysis Composite Resins Models Biological Bite Force Stress (mechanics) Dental Materials Tooth Fractures Imaging Three-Dimensional Elastic Modulus Materials Testing Dentin medicine Humans Maxillary central incisor Computer Simulation Composite material Dental Enamel General Dentistry Elastic modulus Resin cement Cement Tooth Crown Resin Cements Incisor medicine.anatomical_structure Glass Stress Mechanical Zirconium Dental Pulp Cavity Post and Core Technique |
| Zdroj: | Operative dentistry. 34(2) |
| ISSN: | 0361-7734 |
| Popis: | The current study evaluated the influence of two endodontic post systems and the elastic modulus and film thickness of resin cement on stress distribution in a maxillary central incisor (MCI) restored with direct resin composite using finite element analysis (FEA). A three-dimensional model of an MCI with a coronary fracture and supporting structures was performed. A static chewing pressure of 2.16 N/mm2 was applied to two areas on the palatal surface of the composite restoration. Zirconia ceramic (ZC) and glass fiber (GF) posts were considered. The stress distribution was analyzed in the post, dentin and cement layer when ZC and GF posts were fixed to the root canals using resin cements of different elastic moduli (7.0 and 18.6 GPa) and different layer thicknesses (70 and 200 microm). The different post materials presented a significant influence on stress distribution with lesser stress concentration when using the GF post. The higher elastic modulus cement created higher stress levels within itself. The cement thicknesses did not present significant changes. |
| Databáze: | OpenAIRE |
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