Fracture strength of all-ceramic crowns with varying core elastic moduli

The aim of this study was to investigate the fracture strength of aluminous porcelain jacket crowns on core structures with different elastic moduli. Forty standardized aluminous porcelain jacket crowns were fabricated and divided into four groups. Each crown was luted with zinc phosphate cement ont...

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Bibliographic Details
Published in:Australian dental journal 2000-06, Vol.45 (2), p.103-107
Main Authors: Lee, S K, Wilson, P R
Format: Article
Language:English
Subjects:
Aluminum Oxide - chemistry
Analysis of Variance
Cementation
Ceramics - chemistry
Chromium Alloys - chemistry
Copper - chemistry
Crowns
Dental Alloys - chemistry
Dental Porcelain - chemistry
Dental Prosthesis Design
Dental Restoration Failure
Dentistry
Elasticity
Gold Alloys - chemistry
Humans
Materials Testing
Post and Core Technique
Stress, Mechanical
Tensile Strength
Titanium - chemistry
Zinc - chemistry
Zinc Phosphate Cement - chemistry
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Summary:The aim of this study was to investigate the fracture strength of aluminous porcelain jacket crowns on core structures with different elastic moduli. Forty standardized aluminous porcelain jacket crowns were fabricated and divided into four groups. Each crown was luted with zinc phosphate cement onto a master die with a known elastic modulus, and loaded until failure occurred. The fracture load was shown to increase with increasing elastic modulus of the core. Analysis of data by ANOVA revealed a significant difference (p < 0.05) between the four groups. The results suggested that core elastic modulus may have an influence on the fracture resistance of aluminous porcelain jacket crowns, and it may be appropriate to recommend the use of high modulus metals for core placement on teeth to be restored with all-ceramic crowns.
ISSN:0045-0421