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Table 2 Group statistics for colony count of L. acidophilus at two-time intervals

From: The antibacterial effect of silver, zinc-oxide and combination of silver/ zinc oxide nanoparticles coating of orthodontic brackets (an in vitro study)

Brackets groups Colony Count of L. acidophilus
T1 T2
Control 65.00 ± 11.40 71.25 ± 11.22
Ag 24.69 ± 13.68a 26.25 ± 10.55a
ZnO 46.25 ± 12.60a, b 48.75 ± 11.83 a, b
Ag/ZnO 12.81 ± 15.07a, b, c 13.13 ± 14.92 a, b, c
  1. T1: test after coating, T2: after 3 months
  2. Data expressed as mean ± S.D%. (n = 12). Data were analysed using ANOVA followed by Post Hoc pairwise comparisons. Statistically significant at aP-value < 0.05 versus control, bP-value < 0.05 versus Ag-group, CP-value < 0.05 versus ZnO-group