Table 3.

Resin shear bond strength of the zirconia ceramic specimens subjected to different surface treatments before and after thermocycling (mean (standard deviation) in MPa).

Group	24 h-Water Storage	5000 Thermocycling
APA	6.6 (1.1) Aa	3.7 (0.6) Ab
10F5	8.3 (1.2) Aa	4.9 (0.8) Bb
10F30	13.5 (1.6) Ba	11.5 (1.8) CDb
20F5	12.6 (2.8) Ba	9.6 (2.1) Cb
20F30	25.2 (3.0) Ca	21.0 (3.0) Eb
30F5	14.9 (2.7) Ba	12.7 (1.6) Db
30F30	34.7 (4.1) Da	29.8 (3.9) Fb

Within the same column, means with the same uppercase letter are not statistically different (p > 0.05). Within the same row, means with the same lowercase letter are not statistically different (p > 0.05).