Influence of Post and Resin Cement on Stress Distribution of Maxillary Central Incisors Restored with Direct Resin Composite
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
19/10/2012
19/10/2012
2009
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Resumo |
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/mm(2) 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 mu m). 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. |
Identificador |
OPERATIVE DENTISTRY, v.34, n.2, p.223-229, 2009 0361-7734 http://producao.usp.br/handle/BDPI/26485 10.2341/08-73 |
Idioma(s) |
eng |
Publicador |
OPERATIVE DENTISTRY INC |
Relação |
Operative Dentistry |
Direitos |
restrictedAccess Copyright OPERATIVE DENTISTRY INC |
Palavras-Chave | #ENDODONTICALLY TREATED TEETH #FINITE-ELEMENT-ANALYSIS #CORE SYSTEMS #FRACTURE STRENGTH #IN-VITRO #PERIODONTAL-LIGAMENT #RETENTIVE PROPERTIES #ENAMEL ANISOTROPY #TORSIONAL FORCES #ROOT FRACTURE #Dentistry, Oral Surgery & Medicine |
Tipo |
article original article publishedVersion |