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Strength and fluoride release characteristics of a calcium fluoride based dental nanocomposite

Paper ID Volume ID Publish Year Pages File Format Full-Text
9774 646 2008 7 PDF Available
Title
Strength and fluoride release characteristics of a calcium fluoride based dental nanocomposite
Abstract

Secondary caries and restoration fracture remain the two most common problems in restorative dentistry. Release of fluoride ions (F) could be a substantial benefit because F could enrich neighboring enamel or dentin to combat caries. The objective of this study was to incorporate novel CaF2 nanoparticles into dental resin to develop stress-bearing, F-releasing nanocomposite. CaF2 nanoparticles, prepared in our laboratories for the first time, were combined with reinforcing whisker fillers in a resin. Flexural strength (mean ± sd; n = 6) was 110 ± 11 MPa for the composite containing 30% CaF2 and 35% whiskers by mass. It matched the 108 ± 19 MPa of a stress-bearing, non-releasing commercial composite (Tukey's at 0.05). The composite containing 20% CaF2 had a cumulative F release of 2.34 ± 0.26 mmol/L at 10 weeks. The initial F release rate was 2 μg/(h cm2), and the sustained release rate after 10 weeks was 0.29 μg/(h cm2). These values exceeded the reported releases of traditional and resin-modified glass ionomer materials. In summary, nanocomposites were developed with relatively high strength as well as sustained release of fluoride ions, a combination not available in current materials. These strong and F-releasing composites may yield restorations that can reduce the occurrence of both secondary caries and restoration fracture.

Keywords
Dental nanocomposite; CaF2 nanoparticles; Fluoride release; Stress bearing; Tooth caries
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Strength and fluoride release characteristics of a calcium fluoride based dental nanocomposite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 29, Issue 32, November 2008, Pages 4261–4267
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us