comparison of various concentrations of tricalcium phosphate nanoparticles on mechanical properties and remineralization of fissure sealants.

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.this in-vitro study consisted of five experimental groups containing prepared nano-fisssure 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.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). 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).addition of 1-5 wt.% β-tcp nanoparticles to the fissure sealants significantly increased the remineralization potential without affecting the mechanical properties.