Effect of Silver Antibacterial Agents on Bond Strength of Fiber Posts to Root Dentin

Abstract

This study was conducted to evaluate whether antibacterial pretreatment irrigation with silver nanoparticles (SNPs) and silver diamine fluoride (SDF) has any effect on bond strength of fiber posts cemented with three types of resin cements in root canal space. Fifty-four endodontically treated maxillary central incisor roots were prepared for fiber post (FRC Postec Plus NO.3, Ivoclar Vivadent) cementation and divided into nine groups in terms of three cement types and two pretreatments with silver antibacterial agents. The cements were as follows: an etch-and-rinse cement (ER, Excite DSC/Variolink N), a self-etch cement (SE, ED Primer/Panavia F2.0), and a self-adhesive cement (SA, Panavia SA Luting Plus). For each cement, the control group was with no treatment and two experimental groups were with SNPs and SDF treatments that were used after acid-etching for ER cement and after EDTA treatment for SE and SA cements. After fiber post cementation, each bonded root was horizontally sectioned into 1-mm thickness microslices to create two slices for each root region (apical, middle and coronal) and underwent push-out bond strength (PBS) test. Data in MPa were analyzed with two-way ANOVA and Tukey test (p=0.05). The interaction of the pretreatment type and cement type was significant (p<0.001). SNPs and SDF significantly increased PBS with ER cement (p≤0.04). This positive effect was also marginally significant for SDF with SE cement (p=0.049). For SA cement, SNPs showed a significant positive effect, but SDF had a significant adverse effect on PBS (p<0.001). The effect of pretreatment with silver antibacterial agents prior to adhesive cementation of fiber posts depends on the resin cement used. Contrary to SNPs with beneficial or no significant effect on bonding for all cements, SDF exhibited a deleterious effect with self-adhesive cement.

Therapeutic Applications of Antimicrobial Silver-Based Biomaterials in Dentistry

“… 89 However, it is worth noting that AgNPs and SDF both have an effect on the bond strength of cemented fiber posts, which depends on the types of resin used. 96

Figure 5 Application of root canal irrigation solution with AgNPs. ( A ) Representative images of Enterococcus faecalis biofilms after treatment with AgNPs for 5, 15 and 30 min; ( B ).

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Effects of chitosan-containing silver nanoparticles or chlorhexidine as the final irrigant on the bond strength of resin-based root canal sealers

“…However, few researchers have studied the bonding of luting cements after treatment of post cavities with AgNP solution. Shafiei et al 25 and Jowkar et al 10 demonstrated that pretreatment of intraradicular dentin with AgNPs improved the post system adhesion. Another study investigated the fracture resistance of nanoparticles in endodontically treated teeth.…”

Pretreatment of dentine as a strategy to improve adhesion: a literature review

“…Recientemente se ha informado que las NPAg podrían usarse como un potente agente antibacteriano antes de los procedimientos de unión, sin comprometer la fuerza de unión de los adhesivos la dentina (6). Se ha demostrado que la presencia de plata en los materiales de restauración dental es eficaz contra bacterias acidogénicas, como estreptococos y lactobacilos.…”

“…Pretratamiento de la dentina como estrategia de mejora de la adhesión: una revisión de la literatura y aumentar la fuerza de unión a la dentina coronal (6). Fatemeh et al, teniendo en cuenta los efectos antibacterianos positivos de las NPAg, recomiendan su uso en odontología restauradora, concluyendo que poseen efectos positivos sobre la fuerza de unión de los sistemas adhesivos de grabado y enjuague y de autograbado.…”