Dental Materials Journal
Online ISSN : 1881-1361
Print ISSN : 0287-4547
Original Paper
Fracture resistance of zirconia-composite veneered crowns in comparison with zirconia-porcelain crowns
Omar ALSADONDavid PATRICKAnthony JOHNSONSarah POLLINGTONDuncan WOOD
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Volume 36 (2017) Issue 3 Pages 289-295

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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.

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© 2017 The Japanese Society for Dental Materials and Devices
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