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Updated: Jul 14, 2026
07:42
Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
Fracture toughness of a ceramic-resin interface
Keyvan Moharamzadeh1, Tabassom Hooshmand, Alireza Keshvad
1School of Clinical Dentistry, University of Sheffield, Claremont Crescent, Sheffield S10 2TA, United Kingdom. k.moharamzadeh@sheffield.ac.uk
Summary
Gritblasting ceramic surfaces provides sufficient micro-mechanical retention for resin bonding, even without hydrofluoric acid etching, when optimized silane treatment is used. This improves long-term interfacial fracture toughness.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials
Background:
- Dental ceramics require robust bonding to resin cements for restoration longevity.
- Surface treatments are crucial for enhancing the adhesion between ceramic substrates and luting resins.
- Optimized silane coupling agents improve the chemical interaction at the ceramic-resin interface.
Purpose of the Study:
- To compare the interfacial fracture toughness of ceramic surfaces with different preparations (polished, gritblasted, hydrofluoric acid etched, gritblasted and etched).
- To evaluate the effect of an optimized silane treatment on the bond strength of luting resin to ceramic.
- To assess the durability of the bond after prolonged water storage.
Main Methods:
- Four ceramic surface preparations were tested: polished, gritblasted, hydrofluoric acid etched, and gritblasted and etched.
- An optimized silane treatment followed by unfilled and luting resins was applied.
- Interfacial fracture toughness (G(Ic)) was measured after 24 hours and 30 days of water storage at 37°C.
Main Results:
- No significant difference in G(Ic) was found among groups after 24 hours.
- After 30 days, gritblasted and hydrofluoric acid etched surfaces showed significantly higher G(Ic) than polished surfaces.
- Water storage significantly increased G(Ic) for gritblasted and hydrofluoric acid etched groups.
Conclusions:
- Micro-mechanical retention via gritblasting is sufficient for ceramic surface preparation.
- Hydrofluoric acid etching is not necessary when using optimized silane treatment and gritblasting.
- Proper silane application is key to achieving durable resin-ceramic bonds.
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