Effect of etch-and-rinse and self-etch modes in universal adhesives on push-out bond strength of fiber post

Abstract

Background Nowadays, the universal adhesive become more popular among clinicians due to its simple procedure. The application of universal adhesive on root canal dentin prior the self-adhesive resin cement may increase bond-strength between fiber post and dentin. The objective of this study was to evaluate the effect of different etching modes (etch-and-rinse and self-etch) to universal adhesives on push-out bond strength of fiber post. Material and Methods Thirty extracted sound human lower premolars were randomly divided into three groups based on adhesives systems prior to fiber post cementation; two-step etch-and-rinse (group A, Adper Scotchbond), etch-and-rinse universal (group B, Prime & Bond Universal), and self-etch universal (group C, Prime & Bond Universal). After adhesive application, self-adhesive resin cement was filled to the prepared root canal (Smart CEM2, Dentsply) for fiber post cementation. The adhesion between the fiber post and root canal walls was investigated using push-out test after 24 h water storage at 37◦C and the modes of failure were determined under SEM. Data were analyzed using two-way ANOVA test and the Bonferroni test was used to compare values among the three adhesives groups, followed by Tukey HSD for multiple comparisons. Furthermore, Weibull parameters were calculated for tested groups. Results Universal adhesive with self-etch mode significantly improved bond-strength compared to the two-step etch-and-rinse group ( p <0.05). The coronal part has higher bond strength than the apical section ( p <0.05). However, the bond-strength in two-step etch-and-rinse and etch-and-rinse universal was not significantly different. Self-etch mode showed higher bond strength compared to etch-and-rinse universal adhesive in the apical root section ( p <0.05). SEM revealed that all tested groups predominantly had an adhesive failure ( p >0.05). Conclusions Self-etch mode in universal adhesive system were effectively improved the push-out bond strength of fiber post to root canal dentin, especially in apical root section. Key words: Push-out bond-strength, self-adhesive resin cement, self-etch adhesive, total-etch.

Survey of Adhesive Systems Knowledge Among Conservative Dentistry Specialist Dentist in Indonesia

“…Additionally, the scrubbing method when apply the adhesive and 15 seconds solvent evaporation may enhance bond strength in universal adhesive. 27,29 On the other hand, for dentin etching time, most respondents (90 respondents -85.7%) answered 10 seconds, 12 respondents (11.4%) answered 15 seconds, and three respondents (2.9%) answered 20 seconds. A previous study conducted by Burrer et al in 2020 about etching trials on dentin structures with different times: 15 seconds (control group); 7.5 seconds; 30 seconds; 60 seconds; 120 seconds; using 3M Scotchbond Universal product, resulted in an etching time of 7.5 seconds has a significant decrease in bond strength.…”

“…Fiber post have elastic modulus as same as dentin and its simple procedure by cementing it using an adhesive technique. 27 Previous study mentioned that bond strength of the adhesive system in fiber post cementation were depend on the hybrid layer and resin tag. 28 Total-etch adhesive system has a longer procedure during fiber post cementation.…”

“…29 In order to improve bond strength in fiber post cementation using self-adhesive resin cements and make it adequate alternative to regular resin cements, application of universal adhesive on root canal dentin prior the self-adhesive resin cement may increase bond strength between fiber post and dentin. 27 The universal adhesive system can be used in total-etch, self-etch, or selective-etch mode. Previous study in 2022, mentioned that the universal adhesive in self-etch mode applied to root canal dentin prior fiber post cementation can improve bond strength to root canal dentin.…”

Effect of fiber-reinforced direct restorative materials on the fracture resistance of endodontically treated mandibular molars restored with a conservative endodontic cavity design

“…Also bonding procedures for coronal and radicular dentin are similar, but variations exist in dentin structural components, mineral composition, and properties based on location and physiological changes due to aging and pathology [ 47 ]. Kusumasari et al compared the push-out bonding strenght of self-etch and total-etch modes of universal adhesive systems on apical and coronal dentin surfaces and associated the low bond strength of etch and rinse systems with the exposure of a deeper collagen-fibril network after excessive acid exposure [ 48 ].…”

Influence of bioceramic sealer residues on the adhesion interface with a universal adhesive in the etch-and-rinse strategy, based on the application protocol and evaluation time

“…Regarding the most recurrent failure patterns, the results indicated a higher incidence of cohesive failures in the WB-RB, NB-MB, and NB-RB groups, while WB-MB was adhesive. Considering that adhesive failure indicates a potentially weaker interaction between the adhesive system and the dental substrate 37) , the hypothesis is raised that the passive application of the adhesive system was less effective in interacting with a hypermineralized substrate due to impregnation with bioceramic sealer, possibly due to the lower infiltration capacity of the adhesive system, suggesting the active use of application. After 1 year, as expected, with the degradation of the hybrid layer, there is a decrease in bond strength 36) , and adhesive failures were predominant in all groups.…”