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Table 2 Shear bond strength values in all six groups

From: Evaluation of shear bond strength of orthodontic brackets using trans-illumination technique with different curing profiles of LED light-curing unit in posterior teeth

  N Mean (MPa) Standard deviation Standard error Minimum (MPa) Maximum (MPa)
Group 1 10 13.6 0.44 0.13 13.0 14.1
Group 2 10 13.9 0.54 0.17 13.4 14.8
Group 3 10 2.9 0.34 0.11 2.4 3.5
Group 4 10 3.5 0.37 0.11 2.9 3.9
Group 5 10 4.9 0.62 0.19 4.1 6.1
Group 6 10 8.4 0.94 0.29 7.2 9.5
Total 60 7.9 4.59 0.59 2.4 14.8
  1. Group 1 (control): 40 s, 650 mW/cm2, buccal; group 2 (control): 40 s, 800 mW/cm2, buccal; group 3: 40 s, 650 mW/cm2, lingual; group 4: 80 s, 650 mW/cm2, lingual; group 5: 40 s, 800 mW/cm2, lingual; group 6: 80 s, 800 mW/cm2, lingual. The highest mean bond strength was seen in group 2 and the lowest value was in group 3.