Comparison of Different Universal Adhesive Systems on Dentin Bond Strength

Abstract

Over the past few decades, adhesive dentistry has advanced significantly. In light of minimal-invasive dentistry, this novel technique advocates a more conservative cavity design that relies on the efficiency of present enamel-dentine adhesives. The study aimed to address the scientific deficit in understanding the long-term bonding performance of universal adhesives and to provide a new clinical solution with desirable bond strength to dentin. The dentin bond strength of three bonding agents, G2-Bond Universal (GC), Clearfil SE Bond (Kuraray), and Scotchbond Universal Plus (3M ESPE), was evaluated following various storage and etching modes. The UltraTester (Ultradent) bond strength testing machine was used to assess shear bond strength. The results showed that thermal cycling and the choice of adhesive system significantly affected the shear bond strength (p = 0.018 and p = 0.001, respectively). Among the three adhesives, Scotchbond Universal Plus had the lowest bond strength value (mean value = 24.78 MPa), while G2-Bond Universal was found to have desirable shear bond strength to dentin compared to the other adhesives, even after one year in the oral environment (mean value = 35.15 MPa). These findings imply that the HEMA-free universal adhesive G2-Bond Universal is the most effective universal adhesive for clinical practices, particularly when applied in the self-etch mode.

Bond Strength of Low-Viscosity Bulk-Fill Composite and Adhesives Using 10-Methacryloyloxydecyl Dihydrogen Phosphate (10-Mdp)

“…Our use of TBS to assess binding strength is in line with earlier research [38,39]. Nonetheless, there are well-known drawbacks of in-vitro research.…”

Bond Strength Evaluation of Universal Adhesives Applied in Self-Etch and Etch-and-Rinse Modus on Sound and High-Level Irradiated Dentin - a Controlled Laboratory Study

“…al. [52] using adhesive systems with a low pH revealed increased adhesion in the self-etch mode compared to the etch-and-rinse mode measured by µTBS on dentin. The used materials in the present investigation showed nearly no differences in pH, so this factor could be neglected.…”

“…Comparing universal adhesives with other adhesive systems, they are characterized by their ability to be applied in different conditioning modes, as described above. The literature shows varying results regarding the influence of conditioning modes on the adhesive bond strength of different restorations [52][53][54][55]. Iatrogenic processing of dentin creates the so-called "smear layer", which is a physical barrier to the infiltration of the adhesive system [56,57].…”

“…Furthermore, like in the present study, in the above mentioned investigations differences in bond strength were described when comparing different materials from different manufacturers. The pH of the applied adhesive systems plays a role here: ultra-mild universal adhesive systems showed an advantage for the additional use of phosphoric acid [52]. Presumably, the acidity of these products is not sufficient to expose enough collagen fibers to ensure good hybridization.…”