Fracture resistance of zirconia-composite veneered crowns in comparison with zirconia-porcelain crowns
Year: 2017
Type: article
Abstract: The objectives were to evaluate the fracture resistance and stress concentration in zirconia/composite veneered crowns in comparison to zirconia/porcelain crowns using occlusal fracture resistance and by stress analysis using finite element analysis method. Zirconia substructures were divided into two groups based on the veneering material. A static load was applied occlusally using a ball indenter and the load to fracture was recorded in Newtons (N). The same crown design was used to create 3D crown models and evaluated using FEA. The zirconia/composite crowns subjected to static occlusal load showed comparable results to the zirconia/porcelain crowns. Zirconia/composite crowns showed higher stress on the zirconia substructure at 63.6 and 50.9 MPa on the zirconia substructure veneered with porcelain. In conclusion, zirconia/composite crowns withstood high occlusal loads similar to zirconia/porcelain crowns with no significant difference. However, the zirconia/composite crowns showed higher stress values than the zirconia/porcelain crowns at the zirconia substructure.
Source: Dental Materials Journal
DOI: 10.4012/dmj.2016-298
Authors: Omar ALSADON, David PATRICK, Anthony JOHNSON, Sarah POLLINGTON, Duncan WOOD
Institutions: King Saud University, University of Sheffield
Language: English
Subfield: General Dentistry
Field: Dentistry
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W2586535313