Group Mean (SD) Group Mean (SD) Group Mean (SD) Significance
1A pre 1.218 (0.8133) 1B pre 2.357 (1.210) 1D not 5.817 (3.949) 1A+1B ns
1A+1D p<0.01
1B+1D p<0.05
1A not 1.235 (0.5784) 1B not 1.347 (0.5784) 1D not 8.276 (5.670) 1A+1B ns
1A+1D p<0.05
1B+1D p<0.01
2A pre 6.018 (3.647) 2B pre 5.360 (3.787)     ns
2A not 6.395 (3.319) 2B not 2.459 (1.472)     p<0.01
3BE not 1.267 (0.9743) 3CE not 7.090 (3.425)     p<0.001
Table 1: Differences in mean shear bond strength after the different surface preparation methods.