Fracture Toughness of Veneering Ceramics for Fused to Metal (PFM) and Zirconia Dental Restorative Materials
2010
Fracture Toughness of Dental Veneering Ceramics
Sample size: 6
publication
Evidence: high
Author Information
Author(s): Janet B. Quinn, George D. Quinn, Sundar Veeraraghaven
Primary Institution: National Institute of Standards and Technology
Hypothesis
Are zirconia veneering ceramics more susceptible to chipping than PFM veneering ceramics?
Conclusion
The fracture toughness of PFM veneer is significantly greater than that of PFZ veneer.
Supporting Evidence
- The fracture toughness of the PFM veneer was 1.10 MPa√m ± 0.13 MPa√m.
- The fracture toughness of the PFZ veneer was 0.73 MPa√m ± 0.02 MPa√m.
- Precracks were easier to measure in the PFZ veneer compared to the PFM veneer.
Takeaway
This study looked at how strong different dental materials are when they break. It found that one type of material is much tougher than another.
Methodology
The fracture toughness was measured using the surface crack in flexure (SCF) method.
Limitations
Precrack identification was difficult for the PFM veneer.
Statistical Information
P-Value
<0.01
Confidence Interval
± 0.13 MPa√m for PFM, ± 0.02 MPa√m for PFZ
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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