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Table 2 Longitudinal changes in salivary pH values for each group from T0 to T3

From: Salivary pH changes under the effect of stainless steel versus elastomeric ligatures in fixed orthodontic patients: a single-center, randomized controlled clinical trial

pH value at T0 T1 T2 T3 p value
Ligature Mean SD Mean SD Mean SD Mean SD T0-T1 T0-T2 T0-T3
Stainless Steel 6.72 0.14 6.72 0.14 6.78 0.13 6.81 0.14 0.81NS 0.00* 0.00*
Elastomeric 6.77 0.16 6.72 0.13 6.67 0.13 6.64 0.13 0.00* 0.00* 0.00*
  1. T0 baseline, T1 2 weeks, T2 6 weeks and T3, 12 weeks from T0, NS indicates nonsignificant
  2. *Significant p value < 0.05