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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Stress distribution on dentin-cement-post interface varying root canal and glass fiber post diameters. A three-dimensional finite element analysis based on micro-C data

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Lazari, Priscilla Cardoso [1] ; Nunes de Oliveira, Rodrigo Caldeira [2] ; Anchieta, Rodolfo Bruniera [1] ; de Almeida, Erika Oliveira [1] ; Freitas Junior, Amilcar Chagas [3] ; Kina, Sidney [1] ; Rocha, Eduardo Passos [1]
Total Authors: 7
[1] Univ Estadual Paulista, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, Aracatuba, SP - Brazil
[2] Sao Leopoldo Mandic, Campinas, SP - Brazil
[3] Potiguar Univ UnP, Sch Hlth Sci, Natal, RN - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Applied Oral Science; v. 21, n. 6, p. 511-517, NOV-DEC 2013.
Web of Science Citations: 9

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. (AU)

FAPESP's process: 08/00209-9 - Biomechanical behavior of a mandibular class I removable partial denture distally supported by an osseointegrated implant: tridimensional analysis by finite element analysis
Grantee:Eduardo Passos Rocha
Support Opportunities: Regular Research Grants