Finite element analysis and fracture resistance testing of a new intraradicular post
| Autor: | Eduardo Galera da Silva, Pedro Yoshito Noritomi, André Yugou Uehara, Eron Toshio Colauto Yamamoto, Daniel Takanori Kemmoku, Clovis Pagani |
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| Přispěvatelé: | Universidade Estadual Paulista (UNESP), Universidade Estadual de Campinas (UNICAMP), Universidade Estadual Paulista (Unesp) |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Dental Stress Analysis
medicine.medical_specialty Materials science Compressive Strength Surface Properties Stress fractures Finite Element Analysis Stress (mechanics) Random Allocation Tooth Fractures Imaging Three-Dimensional Tensile Strength Materials Testing Ultimate tensile strength medicine Animals General Dentistry Stress concentration Titanium Orthodontics Analysis of Variance Universal testing machine Finite element analysis Original Articles medicine.disease Finite element method Surgery lcsh:RK1-715 Compressive strength Dental Prosthesis Design lcsh:Dentistry Fracture (geology) Post and core technique Cattle Stress Mechanical |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Web of Science Journal of Applied Oral Science Journal of Applied Oral Science, Vol 20, Iss 4, Pp 427-434 (2012) |
| Popis: | Made available in DSpace on 2013-08-12T19:08:04Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Made available in DSpace on 2013-08-12T19:08:04Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Made available in DSpace on 2013-09-30T18:35:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Made available in DSpace on 2013-09-30T18:35:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Made available in DSpace on 2013-08-12T19:08:04Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T14:05:21Z No. of bitstreams: 0 Made available in DSpace on 2013-09-30T18:35:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T14:05:21Z No. of bitstreams: 0 Made available in DSpace on 2014-05-20T14:05:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Made available in DSpace on 2013-09-30T18:35:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Made available in DSpace on 2014-05-20T14:05:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T14:05:21Z No. of bitstreams: 0 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T14:05:21Z No. of bitstreams: 0 Made available in DSpace on 2014-05-20T14:05:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Made available in DSpace on 2014-05-20T14:05:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Objectives: The objective of the present study was to evaluate a prefabricated intraradicular threaded pure titanium post, designed and developed at the Sao Jose dos Campos School of Dentistry - UNESP, Brazil. This new post was designed to minimize stresses observed with prefabricated post systems and to improve cost-benefits. Materials and and methods: Fracture resistance testing of the post/core/root complex, fracture analysis by microscopy and stress analysis by the finite element method were used for post evaluation. The following four prefabricated metal post systems were analyzed: group 1, experimental post; group 2, modification of the experimental post; group 3, Flexi Post, and group 4, Para Post. For the analysis of fracture resistance, 40 bovine teeth were randomly assigned to the four groups (n=10) and used for the fabrication of test specimens simulating the situation in the mouth. The test specimens were subjected to compressive strength testing until fracture in an EMIC universal testing machine. After fracture of the test specimens, their roots were sectioned and analyzed by microscopy. For the finite element method, specimens of the fracture resistance test were simulated by computer modeling to determine the stress distribution pattern in the post systems studied. Results: The fracture test presented the following averages and standard deviation: G1 (45.63 +/- 8.77), G2 (49.98 +/- 7.08), G3 (43.84 +/- 5.52), G4 (47.61 +/- 7.23). Stress was homogenously distributed along the body of the intraradicular post in group 1, whereas high stress concentrations in certain regions were observed in the other groups. These stress concentrations in the body of the post induced the same stress concentration in root dentin. Conclusions: The experimental post (original and modified versions) presented similar fracture resistance and better results in the stress analysis when compared with the commercial post systems tested (08/2008PA/CEP). Univ Estadual Paulista UNESP, Sao Jose dos Campos Dent Sch, Dept Restorat Dent, Sao Jose Dos Campos, SP, Brazil Univ Estadual Paulista UNESP, Sao Jose dos Campos Dent Sch, Dept Social Dent, Sao Jose Dos Campos, SP, Brazil State Univ Campinas UNICAMP, Campinas, SP, Brazil Univ Estadual Paulista UNESP, Sao Jose dos Campos Dent Sch, Dept Restorat Dent, Sao Jose Dos Campos, SP, Brazil Univ Estadual Paulista UNESP, Sao Jose dos Campos Dent Sch, Dept Social Dent, Sao Jose Dos Campos, SP, Brazil |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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