Compatibility of Universal Adhesives and Dual Resin Cements Without Amines

Objectives: Evaluate the shear strength between three university adhesive systems with different ph and two dual resin cements
Methods: 30 healthy premolars of humans and extracted by orthodontic indication were used for the study. They were sectioned transversely below the amelocementary junction and in the buccal vestibule with a diamond saw cooled with water to obtain two halves. The cuts were placed in 3 molds each of 20 cylindrical holes (diameter 2mm, height 3mm). Subsequently they were placed in epoxy resin to insert the specimens. They were then stored and pooled in distilled water at 37 ° C for 30 days. The teeth were randomly assigned to three universal adhesive agreement groups (n = 20): All¬Bond Universal (Bisco), Universal Single Bond (3M), Tetric N Bond (Ivoclar Vivadent). Each group was subdivided into two groups (n = 10): 1) cemented with Duolink (BISCO); 2) cemented with RelyX Ultimate (3M ESPE). Adhesives and cements were applied according to the manufacturer's instructions. After that, the samples were fixed in a Bonding Clamps (Ultradent Products Inc). Then we worked on the 3 groups of adhesives with the respective dual cements, a resin cylinder (amelogen, ultradent) was the restorative material to be joined. Testing machine (Ultradent Products Inc.) was used for the shear test. The data were evaluated by t-student and ANOVA.
Results: Statistical analyzes reveal that there are no statistically significant differences in shear bond strength according to the type of adhesive system used (p = 0.428) or the type of dual cement used (p = 0.688), however, the interaction between These two factors were statistically significant (p <0.001).

When the All-Bond Universal® system was used, the RUC values were higher when used in conjunction with Duo LinkTM (p <0.05). In the case of ScotchBond UniversalTM adhesive, the highest RUC values were obtained when used together with RelyXTM Ultimate cement (p <0.05). In the case of the Tetric Bond Universal adhesive, the differences in the RUC between the two cements were not statistically significant (p> 0.05).
Conclusions: It is important to take into account the biocompatibility of components of dental materials for a better adhesion result. Tetric N Bond Universal is the most biocompatible universal adhesive for cements with or without amines.