Stress distribution on dentin-cement-post interface varying root canal and glass fiber post diameters. A three-dimensional finite element analysis based on micro-CT data
| Autor: | Erika Oliveira de Almeida, Rodolfo Bruniera Anchieta, Priscilla Cardoso Lazari, Eduardo Passos Rocha, Amilcar Chagas Freitas Júnior, Sidney Kina, Rodrigo Caldeira Nunes de Oliveira |
|---|---|
| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Sao Leopoldo Mandic, Potiguar Univ UnP |
| Rok vydání: | 2013 |
| Předmět: |
Dental Stress Analysis
Materials science Surface Properties Tooth root Root canal Finite Element Analysis Glass fiber Dentistry Stress (mechanics) Reference Values Dental cement Elastic Modulus Tensile Strength Materials Testing Ultimate tensile strength Dentin medicine Humans Composite material General Dentistry Stress concentration Dental Pulp Cavity Dental cements business.industry Finite element analysis X-Ray Microtomography Original Articles Models Dental lcsh:RK1-715 medicine.anatomical_structure lcsh:Dentistry Post and core technique Glass Stress Mechanical business Dental pins |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Journal of Applied Oral Science Journal of Applied Oral Science v.21 n.6 2013 Journal of applied oral science Universidade de São Paulo (USP) instacron:USP Journal of Applied Oral Science, Vol 21, Iss 6, Pp 511-517 (2013) Journal of Applied Oral Science, Volume: 21, Issue: 6, Pages: 511-517, Published: DEC 2013 |
| ISSN: | 1678-7757 |
| DOI: | 10.1590/1679-775720130203 |
| Popis: | Made available in DSpace on 2014-12-03T13:10:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-11-01Bitstream added on 2014-12-03T13:23:06Z : No. of bitstreams: 1 S1678-77572013000600511.pdf: 3478255 bytes, checksum: 5a8a195b546c86b9a66854f813686134 (MD5) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Objective: The aim of the present study was to analyze the influence of root canal and glass fiber post diameters on the biomechanical behavior of the dentin/cement/post interface of a root-filled tooth using 3D finite element analysis. Material and Methods: Six models were built using micro-CT imaging data and SolidWorks 2007 software, varying the root canal (C) and the glass fiber post (P) diameters: C1P1-C=1 mm and P=1 mm; C2P1-C=2 mm and P=1 mm; C2P2-C=2 mm and P=2 mm; C3P1-C=3 mm and P=1 mm; C3P2-C=3 mm and P=2 mm; and C3P3-C=3 mm and P=3 mm. The numerical analysis was conducted with ANSYS Workbench 10.0. An oblique force (180 N at 45) was applied to the palatal surface of the central incisor. The periodontal ligament surface was constrained on the three axes (x=y=z=0). Maximum principal stress (sigma(max)) values were evaluated for the root dentin, cement layer, and glass fiber post. Results: The most evident stress was observed in the glass fiber post at C3P1 (323 MPa), and the maximum stress in the cement layer occurred at C1P1 (43.2 MPa). The stress on the root dentin was almost constant in all models with a peak in tension at C2P1 (64.5 MPa). Conclusion: The greatest discrepancy between root canal and post diameters is favorable for stress concentration at the post surface. The dentin remaining after the various root canal preparations did not increase the stress levels on the root. Univ Estadual Paulista, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, Aracatuba, SP, Brazil Sao Leopoldo Mandic, Campinas, SP, Brazil Potiguar Univ UnP, Sch Hlth Sci, Natal, RN, Brazil Univ Estadual Paulista, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, Aracatuba, SP, Brazil FAPESP: 08/00209-9 CAPES: BEX 2325-05-5 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|