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Table 4 Comparison of detachment number in groups A and B with a high/low value of I.I.

From: A 15-month evaluation of bond failures of orthodontic brackets bonded with direct versus indirect bonding technique: a clinical trial

Group Number of bond Number of failure Percentage Chi-squared test
I.I. < 4 mm     
 A 528 22 4.17 ns
 B 192 13 6.77
I.I. ≥ 4 mm     
 A 264 6 2.27 ns
 B 264 13 4.92
  1. Group A: bonded with the direct technique; group B: bonded with the indirect technique. ns, not significant.