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Influence of connector design on fracture probability of ceramic fixed-partial dentures
Citation Link: https://doi.org/10.15480/882.1611
Publikationstyp
Journal Article
Date Issued
2002
Sprache
English
Author(s)
Institut
TORE-DOI
Journal
Volume
81
Issue
9
Start Page
623
End Page
627
Citation
Journal of dental research 9 (81): 623-627 (2002-09)
Publisher DOI
Publisher
Sage
Fracture of ceramic fixed-partial dentures (FPDs) tends to occur in the connector area because of stress concentrations. The objective of this study was to test the hypothesis that the radius of curvature at the gingival embrasure of the FPD connector significantly affects the fracture resistance of three-unit FPDs. Two three-dimensional finite element models (FEMs), representing two FPD connector designs, were created in a manner corresponding to that described in a previous experimental study (Oh, 2002). We performed fractographic analysis and FEM analyses based on CARES (NASA) post-processing software to determine the crack initiation site as well as to predict the characteristic strength, the location of peak stress concentrations, and the risk-of-rupture intensities. A good correlation was found between the experimentally measured failure loads and those predicted by FEM simulation analyses. Fractography revealed fracture initiation at the gingival embrasure, which confirms the numerically predicted fracture initiation site. For the designs tested, the radius of curvature at the gingival embrasure strongly affects the fracture resistance of FPDs.
Subjects
Ceramics
Computer Simulation
Dental Abutments
Finite Element Analysis
Humans
Materials Testing
Probability
Reproducibility of Results
Statistics as Topic
Stress, Mechanical
Surface Properties
Weight-Bearing
Dental Restoration Failure
Denture Design
Denture, Partial, Fixed
DDC Class
620: Ingenieurwissenschaften
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