Table 2: Descriptive statistics (in MPa) of shear bond strengths of the 6 groups tested (each group consisted of 20 specimens).

GroupApplianceContaminationMeanSDMinMedianMaxTukey*

1Orthodontic bracketDry environment14.653.217.3413.7821.11A
2Orthodontic bracketWater contamination3.331.531.343.285.78B
3Orthodontic bracketSaliva contamination3.121.011.143.025.34B
4Disinclusion buttonDry environment14.042.239.9814.5520.43A
5Disinclusion buttonWater contamination5.891.213.955.967.94C
6Disinclusion buttonSaliva contamination5.780.974.075.887.03C

Tukey grouping: means with the same letter are not significantly different.