Purpose: This study was carried out to investigate the remineralizing effect of amorphous calcium phosphate (ACP) and calcium fluoride (CaF 2) nanoparticles incorporated in two-step self etch-adhesives (in vivo). Materials and Methods: The nanoparticles were incorporated into the bond of Clearfil TM SE Bond at a mass fraction of 10%. A total of ten patients in the age range of 17-30 years old, having at least 3 carious lower molars, were enrolled in this study (split mouth design). Class I cavity preparation was performed, leaving the caries affected dentine at the pulpal floor. The 30 molars were divided into 3 groups (n=10) according to the type of adhesive used (A); namely: self-etch adhesive, Clearfil SE Bond (Control)(A 1), Clear Fill SE Bond incorporated with ACP NPs (A 2) and Clearfil SE Bond incorporated with CaF 2 NPs (A 3). After restoration placement, each tooth was radiographically evaluated at baseline (I 0), after 1 month (I 1) and after 3 months (I 2) to assess the remineralizing effect of the adhesive systems used. Results: The adhesive containing ACP nanoparticles induced the highest remineralization potential during all the study intervals, followed by the adhesive containing (CaF 2) nanoparticles. Conclusion: nanoparticles are capable of remineralizing the caries affected dentin when incorporated into two-step self etch adhesive.
Purpose: This study was carried out to investigate the remineralizing effect of amorphous calcium phosphate (ACP) and calcium fluoride (CaF 2) nanoparticles incorporated in two-step self etch-adhesives (in vivo). Materials and Methods: The nanoparticles were incorporated into the bond of Clearfil TM SE Bond at a mass fraction of 10%. A total of ten patients in the age range of 17-30 years old, having at least 3 carious lower molars, were enrolled in this study (split mouth design). Class I cavity preparation was performed, leaving the caries affected dentine at the pulpal floor. The 30 molars were divided into 3 groups (n=10) according to the type of adhesive used (A); namely: self-etch adhesive, Clearfil SE Bond (Control)(A 1), Clear Fill SE Bond incorporated with ACP NPs (A 2) and Clearfil SE Bond incorporated with CaF 2 NPs (A 3). After restoration placement, each tooth was radiographically evaluated at baseline (I 0), after 1 month (I 1) and after 3 months (I 2) to assess the remineralizing effect of the adhesive systems used. Results: The adhesive containing ACP nanoparticles induced the highest remineralization potential during all the study intervals, followed by the adhesive containing (CaF 2) nanoparticles. Conclusion: nanoparticles are capable of remineralizing the caries affected dentin when incorporated into two-step self etch adhesive.
Objective: This study aimed to evaluate the influence of commonly used beverages, on surface microhardness of Zirconia reinforced glass ionomer (Zirconomer improved) and microhybrid resin-based composite (Filtek Z250).
Materials and methods:A total of 40 disk-shaped specimens were fabricated (20 discs from each type of material). Ten Specimens from each material were immersed in Instant Coffee and the other ten Specimens were immersed in Cola. After initial microhardness recording, each group was subject to thermocycling and then microhardness was re-assessed (n= 10).
Results:It was observed that each of restorative material type, thermocycling, and immersion solution, had a statistically significant effect on mean microhardness of both tested materials irrespective of the other tested variables.
Conclusion:Resin composite showed significant higher hardness values when compared to Zirconia reinforced glass ionomer. There was a significant decrease in hardness in both materials after thermocycling, with a significant influence of soft drinks more than instant coffee.
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