Effect of dentin surface modification using carbon nanotubes on dental bonding and antibacterial ability

Abstract

This study developed carbon nanotube coatings for the dentin surface and investigated the bonding strength and the in vitro antibacterial properties of carbon nanotube-coated dentin. Single-walled carbon nanotubes and multi-walled carbon nanotubes were first modified and then characterized using Fourier-transform infrared spectroscopy, scanning electron microscope, and transmission electron microscopy. Second, dentin samples were coated using either single-walled carbon nanotubes or multi-walled carbon nanotubes and observed under a scanning electron microscope. Then, the shear bonding strength and antibacterial properties of the dentin samples were tested. The results showed that both modified single-walled carbon nanotubes and multi-walled carbon nanotubes formed a stable coating on the dentin surface without affecting the shear bonding strength. Moreover, the antibacterial properties of the single-walled carbon nanotube-coated samples was obviously superior to those of the multi-walled carbon nanotubecoated samples. Consequently, single-walled carbon nanotube coating may be an antibacterial agent for potential application in the dental bonding field.

RETRACTED: Influence of carbon and graphene oxide nanoparticle on the adhesive properties of dentin bonding polymer: A SEM, EDX, FTIR study

“…44 In our study, the inclusion of CNPs inside the adhesives also improved their bond strength (although less than the 2.5% GNP adhesive), and our results agree with the findings of a similar previous study. 24 CNPs interact and adhere selectively with the collagen fibers of dentin, 13,14 and this could have probably resulted in improving the bond strength of the adhesive, as seen in the current study. Most of the failures detected in the present study were adhesive in nature.…”

“…On the other hand, the nanosized CNPs could penetrate the gaps between dentinal collagen fibers, which range between 20 and 30 nm, resulting in the formation of a uniform HL and more robust resin tags sufficiently. 14,46,47 Therefore, adding GNPs and CNPs could improve dentin interaction of the adhesive, and further studies are essential to authenticate the results of our study.…”

“…Suo et al also indicated that CNPs intermingle with the collagen fibers, forming a firm surface coating on dentin. 14 Although these studies show the effectiveness of CNPs in binding to the dentin, in these studies, the CNPs were directly coated onto the dentin surface. In this lieu, the current study could potentially convey novel findings as we aim to include CNPs as part of the adhesive’s chemical composition and then evaluate the effect of this inclusion on its different properties.…”

Current perspectives on dental adhesion: (1) Dentin adhesion – not there yet

“…Silver nanoparticles have also been used in several studies with promising results regarding toxicity and preservation of the bonds [ 155 , 156 ]. Dentin adhesives and resin cements containing nanotubes loaded with different active substances have also been used in vitro within the last 10 years with very encouraging outcomes [ [157] , [158] , [159] , [160] ].…”

Application of Nanomaterials to Enhance Polymerase Chain Reaction

“…CNTs are greatly advantageous because of high electron transport without electronic scattering and electronic conductivity; thus, they provide high-performance sensing transistors. More specifically, CNTs possess a high aspect ratio (the ratio of lateral size to thickness), large specific surface area (SWCNT > 1600 m 2 /g, MWCNT > 430 m 2 /g), as well as good mechanical and electrical (~5000 s/cm) properties [26,27]. The SEM and TEM images of SWCNTs and MWCNTs are shown in Figure 3.…”