Composites made of flame-sprayed bioactive glass 45S5 and polymers
Bioactivity and immediate sealing properties
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Date
2010-11
Publication Type
Journal Article
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yes
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Abstract
Aim To engineer systems using polyisoprene (PI) or polycaprolactone (PCL) and nanometric bioactive glass 45S5 (BG) that could create a hydroxyapatite interface and thus ultimately make the use of an endodontic sealer unnecessary.
Methodology Different composites using PI or PCL as matrix material were prepared with BG contents of up to 30 wt%. Unfilled PI and PCL, commercially available filled PI (Obtura gutta-percha) and PCL pellets (Resilon) served as control materials. Bioactivity (in vitro precipitate formation in simulated body fluid) was investigated using scanning electron microscopy and X-ray diffraction analysis. To test immediate sealing ability, simulated root canals were filled with heated materials, and dye leakage was assessed. Leakage was statistically compared between groups using Kruskal-Wallis analysis of variance followed by Mann-Whitney U tests and Bonferroni correction. The alpha-type error was set at 0.05.
Results Both composite systems revealed hydroxyapatite formation on their surface. This was not observed on control materials. Incorporating 30 wt% BG into PI and PCL significantly (P < 0.05) improved their immediate sealing ability compared to that of unfilled polymers, so that dye leakage in simulated root canals was prevented completely.
Conclusion Polyisoprene and PCL composites with BG showed promising results as single root canal filling materials. Incorporation of BG fillers into the polymers under investigation made the resulting composite materials bioactive and improved their immediate sealing ability. © 2010 International Endodontic Journal.
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published
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Journal / series
Volume
43 (11)
Pages / Article No.
1037 - 1046
Publisher
Wiley-Blackwell
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Date created
Subject
Bioglass; Gutta-percha; Nanoparticles; Root canal; Sealer
Organisational unit
03673 - Stark, Wendelin J. / Stark, Wendelin J.
Notes
Received 10 February 2010, Accepted 18 May 2010, Published online 15 July 2010.