Restor Dent Endod.  2019 May;44(2):e13. 10.5395/rde.2019.44.e13.

Influence of silver nanoparticles on resin-dentin bond strength durability in a self-etch and an etch-and-rinse adhesive system

• Jowkar Z
• Shafiei F
• Asadmanesh E
• Koohpeima

• KMID: 2446661
• DOI: http://doi.org/10.5395/rde.2019.44.e13

Abstract

OBJECTIVES
This study evaluated the effect of dentin pretreatment with silver nanoparticles (SNPs) and chlorhexidine (CHX) on the microshear bond strength (µSBS) durability of different adhesives to dentin.
MATERIALS AND METHODS
Occlusal surfaces of 120 human molars were ground to expose flat dentin surfaces. The specimens were randomly assigned to six groups (n = 20). Three groups (A, B, and C) were bonded with Adper Single Bond 2 (SB) and the other groups (D, E, and F) were bonded with Clearfil SE Bond (SEB). Dentin was pretreated with CHX in groups B and E, and with SNPs in groups C and F. The specimens were restored with Z250 composite. Half of the bonded surfaces in each group underwent µSBS testing after 24 hours and the other half was tested after 6 months of water storage.
RESULTS
SNP application was associated with a higher µSBS than was observed in the CHX and control groups for SEB after 24 hours (p < 0.05). A significantly lower µSBS was observed when no dentin pretreatment was applied compared to dentin pretreatment with CHX and SNPs for SB after 24 hours (p < 0.05). The µSBS values of the 6-month specimens were significantly lower than those obtained from the 24-hour specimens for all groups (p < 0.05). This decrease was much more pronounced when both adhesives were used without any dentin pretreatment (p < 0.05).
CONCLUSIONS
SNPs and CHX reduced the degradation of resin-dentin bonds over a 6-month period for both adhesive systems.

Keyword

Adhesive bonding; Chlorhexidine; Microshear bond strength; Silver nanoparticles

MeSH Terms

Adhesives*
Chlorhexidine
Dentin
Humans
Molar
Nanoparticles*
Polymorphism, Single Nucleotide
Silver*
Water
Adhesives
Chlorhexidine
Silver
Water