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Table 1 Mean, standard deviation, minimum and maximum SBS (MPa) values in the four groups (n = 15)

From: Effect of different surface treatments on shear bond strength of ceramic brackets to old composite

Group Minimum Maximum Mean ± Std. Deviation
Control 2.51 8.97 5.07 ± 2.14
Grinding 4.23 12.34 9.16 ± 2.49
Sandblasting 4.87 13.49 8.13 ± 2.58
Er,Cr:YSGG laser 4.23 10.34 6.57 ± 1.45