Evaluation Of The Effect Of Different Surface Treatments, Aging And Enzymatic Degradation On Zirconia-Resin Micro-Shear Bond Strength

Figures & data

Figure 1 Failure modes of the studied groups: Cohesive failure (RC) within the resin cement; a part of resin cement adhered to zirconia surface (black arrow). Interfacial failure (IF) between the cement and zirconia; a little or no resin cement adhered on the zirconia surface (black arrow). Cohesive within the resin composite (CO); the fracture with the composite cylinder (back arrow).

Table 1 Mean In MPa And Standard Deviation (values) Of μSBS Of Tested Groups Subjected To Different Surface Treatments And Aging

Groups	Control	TCL	Water			Esterase
	No storage		2 Weeks	24 Weeks	48 Weeks	2 weeks	24 Weeks	48 Weeks
Control	10.4 (7.2)^a, A	6.2 (3.1)^b, A	6.8 (3.7)^b, A	2.6 (2.9)^c, A	0.2 (0.7)^d, A	9.4 (3.6)^a, A	4.3 (1.6)^b, A	1.2 (0.4)^c, d, A
GB	28.3 (3.2)^a, B	24.4 (3.4)^a, B	25.2 (5.4)^a, B	20.7 (5.9)^a, b, B, C	17.3 (4.2)^b, B	21.1 (7.6)^b, c, B	17.5 (4.4)^b, c, B	13.2 (3.9)^b, d, B
LAS	25.9 (3.8)^a, B	22.3 (3.6)^a, B	20.5 (4.3)^a, B	14.8 (4.7)^b, B	14.8 (4.7)^b, B	21.1 (3.7)^a, B	15.0 (4.2)^b, B	11.8 (3.4)^c, B
SIE	36 (4.3)^a, C	32 (4.2)^a, c	30.2 (8.9)^a, C	28.2 (8.1)^a, C	22.9 (8.3)^b, B	34.6 (4.1)^a, C	30.7 (4.7)^a, C	24.2 (8.2)^b, c

Notes: Similar small superscripts indicate no significant difference between storage media for the same surface treatment (horizontal comparison). Similar capital superscripts indicate no statistical significance between the surface treatments (vertical comparison).

Table 2 Failure Type And Percentage Of Fracture Of Zirconia And Resin Composite Discs

Groups	Control	TCL	Water			Esterase
	No Storage		2 Weeks	24 Weeks	48 Weeks	2 Weeks	24 Weeks	48 Weeks
CON	IF 100%	IF 100%	IF 100%	IF 100%	IF 100%	IF 100%	IF 100%	IF 100%
GB	IF 60% RC 40%	IF 70% RC 30%	IF 80% RC 20%	IF 90% RC 10%	IF 100%	IF 90% RC 10%	IF 100%	IF 100%
LAS	IF 70% RC 30%	IF 80% RC 20%	IF 80% RC 20%	IF 100%	IF 100%	IF 80% RC 20%	IF 100%	IF 100%
SIE	IF 20% RC 30% CO 50%	IF 30% RC 30% CO 40%	IF 40% RC 40% CO 20%	IF 60% RC 40%	IF 70% RC 30%	IF 50% RC 40% CO 10%	IF 80% RC 20%	IF 90% RC 10%

Abbreviations: IF, interfacial; RC, cohesive in resin cement; CO, cohesive in resin composite.