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Table 2 Intragroup differences in plaque index, gingival bleeding index scores, and salivary markers

From: Changes in the oral environment after placement of lingual and labial orthodontic appliances

  Plaque index (mean ± SD) Gingival bleeding index (mean ± SD) Saliva flow rate (ml/min, mean ± SD) Buffering capacity (pH, mean ± SD)
Lingual technique (n = 10) T 0 0.47 ± 0.18 0.18 ± 0.13 1.11 ± 0.47 5.20 ± 0.79
T 1 0.56 ± 0.15 0.22 ± 0.07 1.25 ± 0.38 5.30 ± 0.85
T 2 0.59 ± 0.16 0.29 ± 0.19 1.39 ± 0.46 5.00 ± 0.88
T 0-T 1 * NS NS NS
T 1-T 2 NS NS NS NS
T 0-T 2 * * NS NS
Labial technique (n = 10) T 0 0.42 ± 0.17 0.31 ± 0.21 1.06 ± 0.65 5.35 ± 0.41
T 1 0.52 ± 0.25 0.45 ± 0.17 1.32 ± 0.45 5.75 ± 0.79
T 2 0.43 ± 0.20 0.33 ± 0.13 1.50 ± 1.22 5.50 ± 0.41
T 0-T 1 NS * NS NS
T 1-T 2 NS ** NS NS
  T 0-T 2 NS NS NS NS
  1. NS, not significant. *p < 0.05, **p < 0.01 (Wilcoxon rank test).