alexa Comparison Of Various Concentrations Of Tricalcium Phosphate Nanoparticles On Mechanical Properties And Remineralization Of Fissure Sealants
ISSN: 2161-1122

Dentistry
Open Access

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23rd Global Dentists and Pediatric Dentistry Annual Meeting
July 17-18, 2017 Munich, Germany

Sara Rahimian Emam
Shahed University of Medical Sciences, Iran
Posters & Accepted Abstracts: Dentistry
DOI: 10.4172/2161-1122-C1-021
Abstract
Objective: The aim of this study was to investigate the mechanical properties (flexural strength, micro-shear bond strength) and remineralizing potential of fissure sealants by adding various concentrations of β-tricalcium phosphate nanoparticles. Materials & Methods: This in-vitro study consisted of five experimental groups containing prepared nano-fissure sealants (1-5 wt.% β-TCP nanoparticles) and two control groups containing a prepared and a commercial fissure sealant. Flexural/micro-shear bond strength values were measured using Zwick test machine. Cavities on sixty healthy premolar teeth were filled with the fissure sealants containing 0-5 wt.% of nano β-TCP. The samples were assessed for remineralization under scanning electron microscopy (SEM) and EDAX. Kolmogorov-Smirnov test, one-way ANOVA and Tukey's post hoc analysis/HSD were used to analyze the data. Results: There was no significant difference between the flexural strengths/elastic modulus of the 0-5 wt.% nano β-TCP groups (p>0.05). The average flexural strength/elastic modulus of the prepared fissure sealant group (0%) was significantly higher than the commercial fissure sealant group (Clinpro) (p<0.05). There was no significant difference between micro-shear bond strengths of the experimental groups (1-5 wt. %), and between the commercial and the prepared (0%) fissure sealant groups (p>0.05). Examining the samples under SEM showed a significant increase in thickness of the intermediate layer with increasing concentrations of β-TCP nanoparticles (p<0.05). Conclusion: Addition of 1-5 wt.% -TCP nanoparticles to the fissure sealants significantly increased the remineralization potential without affecting the mechanical properties.
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