Interfacial fracture resistance of ceramic-resin composite bilayer.
Objective: The purpose of this study was to evaluate the relationship between interfacial crack lengths and Vickers indentation loads on ceramic-resin composite specimens. Materials and methods: Five heat-pressed ceramic specimens, with dimension of 3x4x20mm, were fabricated according to the man...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2015
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| Subjects: | |
| Online Access: | https://repository.li.mahidol.ac.th/handle/123456789/1054 |
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| Institution: | Mahidol University |
| Language: | English |
| Summary: | Objective: The purpose of this study was to evaluate the relationship
between interfacial crack lengths and Vickers indentation loads on
ceramic-resin composite specimens.
Materials and methods: Five heat-pressed ceramic specimens, with
dimension of 3x4x20mm, were fabricated according to the manufacturer’s
instructions. For each ceramic bar, the bonding surface was acid-etched,
silanized and bonded with hybrid resin composite. The surface of bonded
specimen used for indentation was polished through 0.01 mm alumina
paste. The diamond pyramidal indenter was used for loading on a ceramic
surface closed to the interface. Loads ranging between 0.98 - 9.8 N were
used for indentation. The interfacial debonding length of each indentation
load was measured. Pearson Correlation analysis was performed for a
statistical analysis.
Results: From Pearson Correlations, there was a positive relationship
between the interfacial crack size and Vickers indentation load (R2
= 0.963).
The result from linear regression analysis indicated that the interfacial crack
length was directly related to the indenter load.
Conclusion: There was a linear relationship between interfacial crack
lengths and indentation loads. The further development of a model
analysis for bilayered structure should be useful for characterizing the
interfacial fracture resistance of dental bilayered specimens. |
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