Microshear Bond Strength of Self-Etch Adhesive Incorporated with Seashell, Pearl, and Hydroxyapatite Nanoparticles to Dentin

Authors

1 Assistant Professor, Operative Dentistry Department, Faculty of Dentistry, Ahram Canadian University (ACU), 6th of October, Egypt

2 Assistant Professor, Operative Dentistry Department, Faculty of Dentistry, Egyptian Russian University.

Abstract

PURPOSE: Various additives have been incorporated into adhesives to prevent hybrid layer degradation and secondary caries progression. The microshear bond strength of self-etch adhesive incorporated with seashell, pearl, and hydroxyapatite nanoparticles to sound dentin surface was evaluated in this current in vitro study. MATERIALS AND METHODS: Forty molars were selected and grouped into four groups (n=10) according to the type of adhesive used; Group S: universal bond incorporated with seashell nanoparticles, Group P: universal bond incorporated with pearl nanoparticles, Group H: universal bond incorporated with hydroxyapatite nanoparticles, Group C: plain universal bond used as control. Superficial dentin surfaces were obtained by sectioning the occlusal enamel horizontally. After bonding procedures, resin composite build-ups were done. The samples were subjected to pH-cycling and microshear bond strength testing. RESULTS: Group S recorded the highest mean value (6.58±1.55), followed by Group H (4.91±1.96), then Group P (4.85±1.46), while the control group recorded the least value (4.07±0.95). There was statistically significant difference between the groups (p=.000). Post hoc test revealed no significant difference between Group H, Group P, and the control group. CONCLUSION: The use of the nanoparticles increased the microshear bond strength of the self-etch adhesive bonded to the superficial sound dentin.

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