Table 2. The microtensile bond strength means (MPa), standard deviations, and distribution of the failure mode for all experimental groups.

Repair protocol	Bond strength	Mixed/Adhesive	Cohesive	Premature
SBU ER+ RC	21.1 ± 7.7B	34 (70.8%)	14 (29.2%)	0 (0%)
SBU SE + RC	12.0 ± 7.6B	26 (53.1%)	17 (34.7%)	6 (12.2%)
RMGIC	33.7 ± 8.6A	34 (50%)	33 (48.5%)	1 (1.5%)

SBU: Scotchbond Universal Adhesive; ER: etch-and-rinse; SE: self-etch; RC: resin composite; RMGIC: resin-modified glass ionomer cement.*Different capital superscript letters indicate statistically significance differences between bond strength values of the repaired groups (p < 0.01).