Performance of Universal Adhesives in Composite Resin Repair

Table 2

μTBS values (MPa) and reduction by aging (%).

Surface treatment		Microtensile bond strength
Etch mode	Group	Fresh repair (MPa)	Aged repair (MPa)	Reduction by aging (%)
N/A	NC	33.70 (5.85)^D	18.68 (3.46)^e	44.6
N/A	A	43.67 (2.82)^C	18.61 (3.70)^e	57.4
Etch-and-rinse	SBM	46.52 (6.00)^C	27.67 (4.23)^d	40.5
	SBU	65.90 (7.04)^A	46.29 (4.71)^ab	29.8
	ABU	61.39 (2.52)^AB	38.96 (3.02)^bc	36.5
	TBU	59.78 (3.06)^AB	41.35 (4.53)^b	30.8
Self-etch	CSE	46.34 (3.93)^C	32.63 (3.59)^cd	29.6
	SBU	62.28 (7.62)^AB	51.76 (8.91)^a	16.9
	ABU	57.71 (9.08)^B	46.18 (7.23)^ab	20.0
	TBU	59.47 (9.05)^AB	36.46 (8.47)^bc	38.7

Standard deviation is shown in parentheses. Within the same column, values with different superscript capital letters and lowercase letters were statistically significantly different among fresh and aged repairs (Tukey HSD, ). indicates a significant reduction in bond strength of each group after 10,000 thermocycles (-test, where ). N/A: not applicable; NC: negative control; SBM: Scotchbond Multi-Purpose; SBU: Single Bond Universal; ABU: All Bond Universal; TBU: Tetric N-Bond Universal; CSE: Clearfil SE Bond.