Table 2: Regional microshear bond strengths of dentin bonding system after treatment with different irrigation solutions (MPa).
Irrigation Solutıons | ||||
Distilled water | NaOCl | EDTA/NaOCl | Chlorhexidine | |
Enamel-dentin junction | ||||
Single Bond Universal | ||||
Self-etch | 28.6 (6.86)a | 19.2 (2.77)b | 17.0 (2.41)c | 19.6 (3.85)b |
Etch & rinse | 28.2 (6.80)a | 18.9 (4.40)b | 20.1 (4.66)b | 21.7 (2.64)b |
F = 9.600 P = 0.000, P < 0.005 | ||||
Coronal dentin | ||||
Single Bond Universal | ||||
Self-etch | 26.7 (3.37)a | 21.7 (2.65)b | 20.8 (4.59)b | 21.0 (2.21)b |
Etch & rinse | 26.0 (3.37)a | 18.9 (2.21)c | 20.1 (3.90)b,c | 21.2 (2.88)b |
F = 5.641 P = 0.000, P < 0.005 | ||||
Pulp dentin chamber | ||||
Single Bond Universal | ||||
Self-etch | 26.3 (3.60)a | 18.3 (2.85)b | 18.1 (3.17)b | 17.5 (2.86)b |
Etch & rinse | 25.2 (3.06)a | 15.1 (4.25)c | 14.6 (3.88)c | 20.7 (1.08)b |
F = 18.586 P = 0.000, P < 0.005 | ||||
Floor of the pulp | ||||
Single Bond Universal | ||||
Self-etch | 12.0 (1.61)a | 9.8 (1.11)b | 8.8 (1.21)b | 8.6 (1.17)b |
Etch & rinse | 11.8 (1.06)a | 8.7 (1.71)b | 8.9 (1.62)b | 9.8 (0.58)a,b |
F = 18.084 P = 0.000, P < 0.005 |
In each row, means with the same lower case superscript letters indicate a nonsignificant difference between groups (p > 0.05).