The effect of incorporating different concentrations of chlorhexidine digluconate on the degree of conversion of an experimental adhesive resin

Abstract

BackgroundThe aim of this study was to evaluate the effect of chlorhexidine digluconate incorporation on the degree of conversion of an experimental adhesive resin.Material and MethodsThe experimental resin was prepared from 70 wt% bisphenol A glycerolate dimethacrylate, 30 wt% hydroxyethyl methacrylate, silanized SiO2 nanofillers, 0.5% of camphorquinone and ethyl 4-dimethylaminebenzoate (binary photo-initiator system). Five chlorhexidine digluconate concentrations (0, 0.5, 1, 2 and 4 wt%) were then incorporated into the experimental resin. Thirty Potassium Bromide pellets were prepared then divided into six groups (n=5/group), repre¬senting the tested adhesive resins (Single Bond 2, 0, 0.5, 1, 2 and 4 wt% chlohexidine-incorporated experimental adhesive resins), that were applied to the pellets without light-curing (uncured specimens). Another 30 pellets were prepared and treated with the previous materials then light-cured using LED light-curing device (cured specimens). Degree of conversion of the uncured and the cured specimens were evaluated using FTIR analysis.ResultsAdper Single Bond 2 showed the highest degree of conversion mean values followed by 0.5 wt% chlorhexidine concentration then 2 wt% followed by 4 wt% then 1 wt% concentrations, while 0 wt% concentration showed the lowest mean values.ConclusionsChlorhexidine digluconate had slight significant influence on the efficiency of polymerization of the experimental adhesive resin. Key words:Chlorhexidine digluconate, different concentrations, degree of conversion, experimental adhesive resin.

Polyphenols and Brazilian red propolis incorporated into a total-etching adhesive system help in maintaining bonding durability

“…As the formulation of adhesives is an industrial secret and making a new adhesive with a balanced composition takes a lot of time and study, we decided to use a commercial total-etch adhesive to formulate the adhesives with quercetin, RES, and BRP used in this research. The average values for bond strength and DC recorded in this research are in accordance with previous studies in which Single Bond 2 showed μTBS values between 31.52 MPa (1 day) and 26.15 MPa (1 year in distilled water) [59] and DC between 67.87% and 79.98% [57,59,60,61].…”

Degradation and Stabilization of Resin-Dentine Interfaces in Polymeric Dental Adhesives: An Updated Review

“…As CHX consists of chlorine, it prevents its hydrolytic activity by binding to the zinc of the catalytic domain of MMPs [104]. When CHX digluconate (0.5 wt.%, 2.0 wt.% and 4.0 wt.%) was incorporated in experimental etch-and-rinse adhesives, no adverse effects on the degree of conversion were found [110]. However, Cadenaro et al [111] demonstrated that, although the degree of conversion was not affected by the incorporation of 1% or 5% CHX into the adhesive resins, the elastic modulus was significantly decreased.…”

Evaluation of different decontamination procedures on bond strength to sound and caries affected dentin using “no-wait” universal adhesive

“…Therefore, few products were proposed as cavity decontaminants with acceptable outcomes. CHX is the most employed cavity decontaminant, which has a potent antimicrobial action on dental caries, and it is capable of impeding the acquired enamel pellicle formation, thus preventing dental plaque development [ 17 ]. Moreover, maintained bond strength values were reported upon dental cavity decontamination using CHX at any assessed concentration, which could be related to its capacity to restrain matrix metalloproteinases (MMPs) responsible for adhesive interfaces degradation, thus showing enhanced bond strength outcomes [ 18 ].…”