Abstract
Objectives: To compare repair bond strength of acrylic and composite resin to different type of artificial teeth with and without thermocycling aging (TMC).
 Materials and Methods: A total of 192 specimens were prepared using four different types of artificial teeth (n=48) (Group CA-Conventional polymethylmethacrylate, Group IS-Isosite, Group DCL-Double cross-linked acrylic, Group NC-Nanohybrid composite). All specimens were aged with thermocycling (TMC; 5000 cycles, 5◦C/55◦C) and repaired with auto-polymerized acrylic resin or composite resin. Half of the repaired samples were subjected to shear bond strength (SBS) test while the other half were subjected to TMC to simulate the aging of the repair material. Then, artificially aged specimens were also subjected to SBS test. Data were statistically analyzed by three-way analysis of variance (ANOVA). Paired comparisons were made using one-way ANOVA, and multiple comparisons were made using Tukey HSD test (α=0.05).
 Results: The bond strength of both non-aged and artificially aged composite resin and non-aged acrylic resin did not differ according to artificial teeth type (p>0.05). However, artificially aged acrylic resin showed higher bond strength for group CA (9.25±2.96) than for group NC (5.01±3.09) (p
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