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Progress in Orthodontics

Table 1 Descriptive statistics and comparison of microleakage values between the study groups for occlusal and gingival sides

From: The effect of different surface treatments of demineralised enamel on microleakage under metal orthodontic brackets

Interface Group Occlusal Gingival Statistical significance
Descriptive values (mm) Pairwise comparisons Descriptive values (mm) Pairwise comparisons
Percentiles Percentiles
25th 50th (median) 75th 25th 50th (median) 75th
Enamel-adhesive 1 (Control) 0 0 0.39 a 0 0 0.84 a P = 0.479
2 (Demineralised/control) 0 0 1.39 a 0 0 1.99 a P = 0.358
3 (Demineralised/NaOCl) 0 0 1.27 a 0 0 1.34 a P = 0.749
4 (Demineralised/SEP) 0 0.31 0.95 a 0 0.72 1.24 a P = 0.409
5 (Demineralised/NaF) 0 0 0   0 0 0   P = 0.317
  Statistical significance P = 0.007     P < 0.001     
Adhesive-bracket 1 (Control) 0 0 0   0 0 0   P = 0.505
2 (Demineralised/control) 0 0 0 b 0 0 0 b P = 0.718
3 (Demineralised/NaOCl) 0 0 0   0 0 0 b P = 0.239
4 (Demineralised/SEP) 0 0 0.44   0 0 0.87   P = 0.184
5 (Demineralised/NaF) 0 0 0 b 0 0 0 b P = 0.336
  Statistical significance P = 0.009     P < 0.001     
  1. a statistically significant difference with group 5; b statistically significant difference with group 4.
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