ObjectiveTo compare the effects of different resin binders on the bond strength and edge microleakage of IPS e.max CAD all-ceramic crowns.
MethodsA total of 63 premolars were selected as the research objects.The IPS e.max CAD all-ceramic crowns and shear strength samples were routinely prepared, and divided into the A group (21 cases), B group (21 cases) and C group (21 cases) according to the different resin adhesives.The A group was bonded with Duo-Link resin adhesive, the B group was bonded with Variolink N resin adhesive, and the C group was bonded with Kerr NX3 resin binder.The shear strength and edge microleakage length among three groups were compared and analyzed using the hot and cold cycle, micro-osmosis and shear strength tests.
ResultsThere was statistical significance in the shear strength among A, B and C groups (P < 0.05).There was no statistical significance in pairwise comparisons between three groups (P>0.05).Among the marginal micro-leakage grades, the 0 to 3 grades in three groups were found, the grade 0 was mostly in A group, the grade 0 and grade 1 were mostly B group, and the grade 1 and grade 2 were mostly in C group.The difference between the three groups was statistically significant (P < 0.05);The differences between A group and B group, A group and C group, and B group and C group were statistically significant (P < 0.05).
ConclusionsThe bonding strength and edge microleakage of IPS e.max CAD all-ceramic crowns are different among the application of the Duo-Link, Variolink N and Kerr NX3.The cutting strength and edge micro-leakage of the application of Kerr NX3 are the highest and lightest, respectively, which has good bonding and good edges.
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