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In vitro evaluation of dental bonding agents using shear and vibrational methods.
R Whiting1, A Campbell, H Baksh
1Department of Physics, University of the West Indies, St. Augustine, Trinidad and Tobago, WI. robin_whiting@hotmail.com
Journal of Dentistry
|December 14, 2001
Summary
Two mechanical tests show promise for evaluating dental bonding agents, yielding consistent data for clinical relevance. Further development could enhance their contribution to assessing dental adhesives.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials
Background:
- Dental bonding agents are crucial for restorative dentistry.
- Reliable in vitro testing methods are needed to assess the performance of dental adhesives.
- Existing methods often yield inconsistent results.
Purpose of the Study:
- To evaluate the suitability of the Iosipescu shear test and the multilayer vibrating reed test for in vitro assessment of dental bonding agents.
- To compare the consistency and clinical relevance of data generated by these two mechanical testing methods.
Main Methods:
- The Iosipescu shear test was employed to induce pure shear stress in notched beam samples.
- The multilayer vibrating reed test assessed bonding effectiveness via relative elastic modulus and mechanical damping factors.
- Tests were conducted on bonded samples of high-copper amalgam, gallium alloy, and composite resin with two adhesive types.
Main Results:
- Both the Iosipescu shear test and the vibrating reed test produced more consistent data with less scatter compared to typical results in the field.
- The data generated by both methods demonstrated potential for clinical relevance in evaluating dental bonding agents.
Conclusions:
- The Iosipescu shear test and multilayer vibrating reed test are suitable for in vitro evaluation of dental bonding agents.
- These mechanical testing methods, with further development, can significantly contribute to the assessment of dental adhesives and their clinical performance.