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Table 4 Number of specimens revealing silver spots detected under 10× magnification

From: Effect on enamel shear bond strength of adding microsilver and nanosilver particles to the primer of an orthodontic adhesive

Groups Number of specimens Group difference
TB 0 A
TB + 0.1% (w/w) μAg 2 A
TB + 0.3% (w/w) μAg 1 A
TB + 0.11% (w/w) nAg 4 B
TB + 0.18% (w/w) nAg 6 B
TB + 0.33% (w/w) nAg 9 B
  1. Groups with the same letters are not statistical different (chi-square test letter A: chi-square = 2.089, df = 2, p = 0.352; chi-square test letter B: chi-square = 3.241, df = 2, p = 0.198). Chi-square test on all groups shows statistically significant difference (chi-square = 20.074, df = 5, p = 0.01).