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Suitability of different substrates for reliable bond strength tests
A E Kaplan1, A M Ubios, A A Beigelis
1Departament of Dental Materials and Pathology, Faculty of Dentistry, University of Buenos Aires.
Acta Odontologica Latinoamericana : AOL
|January 1, 1996
Summary
This study found that bovine dentin, stored in distilled water at 4°C and sectioned at a 125° angle, provides reliable composite-dentine bond strength measurements. These findings optimize methods for dental material testing.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
Background:
- Accurate assessment of composite-dentine bond strength is crucial for evaluating dental restorative materials.
- Standardized methodologies are needed to ensure reliable and reproducible bond strength testing.
Purpose of the Study:
- To analyze various substrates and conditions for determining composite-dentine bond strength.
- To compare results using bovine and human dentin.
- To investigate the influence of sectioning angles and storage solutions on bond strength.
Main Methods:
- Composite-dentine bond strength was tested using tensile strength measurements.
- Bovine dentin samples were prepared and stored under different conditions (e.g., distilled water, artificial saliva).
- Scanning electron microscopy (SEM) was used to observe dentin surface morphology.
Main Results:
- Bovine dentin yielded more reliable bond strength values compared to human dentin.
- Optimal results were achieved with bovine dentin stored in distilled water at 4°C.
- Sectioning bovine dentin at a 125° angle to the vestibular face, within 7 mm of the incisal edge, improved reliability.
Conclusions:
- Specific preparation and storage conditions for bovine dentin enhance the reliability of composite-dentine bond strength testing.
- The findings provide a refined protocol for preclinical evaluation of dental adhesives and composites.
- Optimized bovine dentin models can better simulate
- in vivo
- testing conditions.