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Nanotube-modified dentin adhesive--physicochemical and dentin bonding characterizations.
Marco C Bottino1, Ghada Batarseh, Jadesada Palasuk
1Department of Restorative Dentistry, Division of Dental Biomaterials, Indiana University School of Dentistry (IUSD), Indianapolis, IN 46202, USA.
Dental Materials : Official Publication of the Academy of Dental Materials
|September 24, 2013
Summary
Incorporating Halloysite nanotubes (HNT) into dental adhesives significantly enhances dentin bond strength. Optimal HNT concentrations improve microhardness without compromising key adhesive properties, suggesting potential for durable dental restorations.
Area of Science:
- Dental Materials Science
- Nanotechnology in Dentistry
- Biomaterials Engineering
Background:
- Dental adhesives are crucial for bonding restorative materials to tooth structure.
- Improving the mechanical properties and durability of dental adhesives is an ongoing challenge.
- Halloysite nanotubes (HNT) offer potential as reinforcing agents in polymer composites.
Purpose of the Study:
- To evaluate the impact of incorporating Halloysite nanotubes (HNT) into a commercial dental adhesive (Adper Scotchbond Multi-Purpose/SBMP).
- To assess the effects of HNT on dentin bond strength and key physicochemical properties of the adhesive.
- To determine the optimal concentration of HNT for enhanced adhesive performance.
Main Methods:
- Experimental adhesives were formulated with varying HNT concentrations (5-30 wt.%) within the SBMP adhesive resin.
- Shear bond strength to human dentin was measured.
- Microhardness and degree of conversion (DC) of the modified adhesives were assessed.
Main Results:
- A 30 wt.% HNT concentration yielded the highest statistically significant increase in shear bond strength to dentin (p=0.025).
- Significant improvements in microhardness were observed with 30 wt.% HNT (p<0.001).
- A significant decrease in the degree of conversion (DC) was noted at higher HNT concentrations (p<0.001).
Conclusions:
- Halloysite nanotubes (HNT) can be incorporated into dental adhesives up to 20 wt.% without negatively affecting critical physicochemical properties.
- Modified SBMP adhesive with 20 wt.% HNT shows promise for creating durable dentin bonds.
- HNT's ability to encapsulate therapeutic agents like MMP inhibitors further enhances its potential in dental applications.
