Özet:

Purpose: The purpose of this study is to evaluate the acid and decomposition adhesive, two-stage self-acid adhesive, universal adhesive polymerized by light, and the thermal cycle of universal adhesive polymerized chemically to the dentine after ageing. Tools and Methods: In this study, 48 sub-third large small teeth were used. The mine on the surface was removed with a diamond disk. To create a standard smoar layer, the dentin surfaces were swallowed under water cooling for 60 seconds using a 600 grit silicone carbit slurry. The teeth were distributed to Optibond S Solo Plus, Optibond XTR, Single Bond Universal and Tokuyama Universal Bond adeziv system groups (n=12). Adeziv application was done according to the manufacturer’s recommendations and restoration with microhybrid composite resin was completed. After the thermal exhaust, examples were assessed by the melting bond resistance. The broken types were studied with a stereomicroscope in 40X enlargement. In the statistical assessment of the data, one-way variance analysis (ANOVA) and Tukey HSD test were used. Results: A significant difference was observed between the connectivity resistance of the assessed adhesive systems (p<0.05). Self-acid and two-stage applied Optibond XTR group showed high connectivity resistance, while low connectivity resistance was observed in Tokuyama Universal Bond group. Result: The universal adhesive, which is polymerized by light with a two-stage self-acid adhesive, has shown a similar and clinically acceptable degree of connectivity resistance. The adhesive system, which is self-acid and chemically polymerized, has a lower resistance to bonding than the acid and dirt or self-acid systems. Keywords: Acid relief; Dentine bonding; Closing bonding resistance; Thermal cycle.