TY - JOUR AU - Vimonkittipong , Umaporn AU - Srihatajati, Jirat PY - 2022/07/11 Y2 - 2024/03/29 TI - Effect of Repair Time Intervals and Surface Treatments on Shear Bond Strength of Bisacryl Resin Material Repairing with Flowable Composite Resin JF - Khon Kaen University Dental Journal JA - Khon Kaen Dent J VL - 25 IS - 2 SE - Research Articles DO - UR - https://he01.tci-thaijo.org/index.php/KDJ/article/view/248910 SP - 71-81 AB - <p>The objective of this study was to investigate different repair time intervals by means of thermocycling and different surface treatments on shear bond strength of bisacryl resin material repairing with flowable resin composite. A total of 270 bisacryl resin specimens were randomly divided into 3 groups (n = 90), categorized by the numbers of thermocycling: (1) no cycle (stored in artificial saliva at 37 oC for 1 h), (2) 194 cycles (equivalent to 1 week in mouth) and (3) 5,000 cycles (equivalent to 6 months in mouth). After aging, the specimens in each group were subdivided into 3 subgroups (n = 30), categorized by the methods of surface treatment (no treatment, cylindrical carbide bur, cylindrical carbide bur and AdperTM Single Bond 2). The flowable composite resin (5 mm diameter, 4 mm height) was bonded to all surfaces of bisacryl resin specimens. Specimens were subjected to shear bond strength test by a universal testing machine with a crosshead speed of 0.5 mm/min. Data were analyzed by Two-way ANOVA and Turkey’s test (α= 0.05). Mode of failure was determined under a stereomicroscope. The highest mean shear bond strength was acquired from the carbide cylindrical bur and AdperTM Single Bond 2 group, whereas the no treatment group exhibited the lowest mean bond strength in all time intervals of repair. Besides, the result revealed that shear bond strength values were decreased when the number of thermocycling cycles increased, making the 5,000 cycle specimens had the lowest shear bond strength. Adhesive failure was the most predominant mode of failure. In conclusion, repair time intervals and surface treatments affect to the shear bond strength of bisacryl resin material repairing with flowable composite resin.</p><p> </p> ER -