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Effects of irradiation time and composition on shear strength. After 100 μL of the mixed solution was applied to the porcine skin strips, which resulted in an overlap area of 1 cm2. The overlap area was irradiated using an LED curing light for a designed time. Data are presented as the mean ± SD (n = 9) and were analyzed using the nonparametric Kruskal-Wallis H-test. Differences of p < 0.05 were considered statistically significant. (*) denotes a significant difference (p < 0.05).
