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The Effects of Aluminablasting on Bond Durability Between Universal Adhesives and Tooth Substrate
Operative Dentistry
|November 19, 2019
Summary
Aluminablasting increased surface roughness and energy but did not improve enamel bond strength for universal adhesives. However, it significantly reduced dentin bond strength, suggesting potential adverse effects on dentin bonding.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Surface Science
Background:
- Universal adhesives are widely used in restorative dentistry.
- Surface treatments like aluminablasting are explored to enhance adhesive bonding.
- Understanding the impact of surface treatments on bond durability is crucial.
Purpose of the Study:
- To evaluate the effect of aluminablasting on the bond durability of five universal adhesives.
- To assess changes in surface characteristics (roughness and free energy) after aluminablasting.
- To investigate the influence of aluminablasting on universal adhesive performance on enamel and dentin.
Main Methods:
- Five universal adhesives were tested in self-etch mode on bovine enamel and dentin.
- Specimens were divided into aluminablasted and non-aluminablasted groups.
- Shear bond strength (SBS) was measured after 24 hours and after 30,000 thermal cycles.
- Surface roughness (Ra), surface free energy (SFE), and elemental composition were analyzed.
Main Results:
- Aluminablasting did not significantly alter enamel SBS values for most adhesives.
- Dentin SBS values were significantly reduced in aluminablasted specimens compared to non-aluminablasted ones.
- Aluminablasting significantly increased Ra and SFE on both enamel and dentin surfaces.
- Aluminum (Al) was detected on the blasted tooth surfaces.
Conclusions:
- Aluminablasting increases surface roughness and free energy of enamel and dentin.
- The effect of aluminablasting on bond strength is substrate-dependent, not enhancing enamel bonding.
- Aluminablasting may adversely affect the dentin bond effectiveness of universal adhesives.
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