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Updated: Jun 28, 2025
09:06
Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
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Filler Mixed Into Adhesives Does Not Necessarily Improve Their Mechanical Properties
C Tang1, B Mercelis2, F Zhang3
1Chuliang Tang, KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT, Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, Leuven, Belgium.
Operative Dentistry
|April 18, 2024
Summary
Adding filler particles to adhesive resins did not improve micro-tensile fracture strength (μTFS). However, fillers made the resins less sensitive to water storage, unlike unfilled resins.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Adhesive resins are crucial in dental restorations.
- Their micro-tensile fracture strength (μTFS) can be affected by filler content and water exposure.
- Optimizing filler composition is key to enhancing resin durability.
Purpose of the Study:
- To evaluate how filler type and concentration impact the μTFS of adhesive resins.
- To assess the effect of 1-week water storage on the μTFS of these experimental resins.
- To compare experimental universal adhesives with gold-standard materials.
Main Methods:
- Characterized three filler particles (Glass-S, BioUnion, CPC_Mont) using SEM, TEM, and particle-size analysis.
- Incorporated fillers into an unfilled adhesive resin (BZF-29unfilled) at various concentrations.
- Measured μTFS immediately and after 1-week water storage for experimental and control adhesive resins.
Main Results:
- Incorporating fillers into BZF-29unfilled decreased its immediate μTFS.
- Water storage reduced μTFS in most resins, except for BZF-21.
- Resins with 30 wt% Glass-S and 20 wt% BioUnion showed no significant μTFS reduction after water storage compared to unfilled resin.
Conclusions:
- Filler addition to adhesive resins does not enhance μTFS.
- Fillers can improve the water-storage stability of adhesive resins compared to unfilled formulations.
- Specific filler types and loadings may offer improved resistance to degradation in moist environments.
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