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Effect of Different Specimen Preparation Methods on Dentin Shear Bond Strength: Polyethylene Tubes vs Jig System
The Journal of Adhesive Dentistry
|June 4, 2026
Summary
A jig-based method for preparing dental specimens yielded higher and more consistent shear bond strength (SBS) results for universal adhesives compared to tube-based methods. This suggests a standardized jig approach improves reliability in adhesive dentistry research.
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
- Biomaterials Engineering
Background:
- Shear bond strength (SBS) testing is crucial for evaluating dental adhesives.
- Standardized specimen preparation is vital for reliable SBS test outcomes.
- Current tube-based methods may introduce variability in SBS testing.
Purpose of the Study:
- To compare the influence of different specimen preparation methods on the shear bond strength (SBS) of universal adhesives to dentin.
- To identify a more standardized and reliable protocol for SBS testing in adhesive dentistry.
- To evaluate the impact of tube-removed, tube-retained, and jig-based preparation techniques on SBS results.
Main Methods:
- Extracted molars were prepared, and dentin surfaces were randomly assigned to tube-removed, tube-retained, or jig-based preparation groups.
- Shear bond strength (SBS) testing was conducted using a universal testing machine.
- Failure modes were analyzed microscopically, and SEM examined bonding interfaces.
Main Results:
- Significant differences in SBS were observed among the preparation groups (P < 0.001).
- The jig-based group exhibited the highest mean SBS values, followed by tube-removed and tube-retained groups.
- Adhesive failures predominated, particularly in the jig-based group, which showed a clearer bonding interface via SEM.
Conclusions:
- Specimen preparation significantly impacts the reliability and interpretation of SBS testing.
- The jig-based method appears to offer more consistent and reproducible SBS results than tube-based methods.
- Standardized specimen fabrication is essential for advancing adhesive dentistry research and clinical application.
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