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Table 3 Comparison of the ARIs between the study groups. Group 1: test (chlorinated water at pH 7.4); Group 2: test (chlorinated water at pH 3); Group 3: control (artificial saliva at pH 7). Each subgroup comprises 14 teeth from each group tested at different time points. Subgroup 1: (immediately after bonding), Subgroup 2: (after 6 days of bonding), Subgroup 3: (after 12 days of bonding)

From: Effect of exposure of teeth to Ph change of chlorinated water on shear bond strength of metal orthodontic brackets (an in vitro study)

Time Points

 

Group 1 (n = 42)

Group 2 (n = 42)

Group 3 (n = 42)

P-value1

Subgroup 1

Mean ± SD

1.29 ± 0.83

1.50 ± 0.76

1.50 ± 0.76

0.681

Median

1.00

1.50

1.50

Min – Max

0.00–3.00

0.00–3.00

0.00–3.00

Subgroup 2

Mean ± SD

1.36 ± 0.63

1.57 ± 0.85

1.36 ± 0.63

0.908

Median

1.00

1.50

1.00

Min – Max

0.00–2.00

0.00–3.00

0.00–2.00

Subgroup 3

Mean ± SD

1.57 ± 0.76

1.93 ± 0.92

1.43 ± 0.85

0.301

Median

1.00

2.00

1.50

Min – Max

1.00–3.00

0.00–3.00

0.00–3.00

P value1

0.301

0.906

 

0.909

  1. *Statistics are significant at a P- value < 0.05, P value1: Kruskal_Wallis test