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A comparative study of the shear bond strength and failure mode between zirconia copings and veneering ceramics
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 Title & Authors
A comparative study of the shear bond strength and failure mode between zirconia copings and veneering ceramics
Kim, Won-Young; Jeon, Byung-Wook; Chung, In-Sung;
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Purpose: The aim of this study was to investigate the shear bond strength between various commercial zirconia coping and veneering ceramic, and to observe the failure mode. Methods: For each zirconia block (iJAM Emerald, LUXEN Smile block, ICE Zirkon transluzent), 10 rectangular specimens were layered with Cercon ceram kiss, IPS e.max ceram, ICE Zirkon ceramic according to recommended by the manufacturer. The shear bond strength tests of the veneering porcelain to zirconia were carried out until fracture by a universal testing machine. After the shear bond tests, failure modes were characterized visually, under a stereomicroscope, such as adhesive, cohesive, or mixed. Data were analyzed with One-way ANOVA followed by Scheffe`s tests. Results: The shear bond strength () of zirconia-veneer ceramic were JC group ; JE group ; JI group ; LC group ; LE group ; LI group ; ZC group ; ZE group ; and ZI group . The One-way ANOVA showed a significant difference between groups (p<0.05). The failure mode in most experimental groups was mixed failure, except for the LC group, which showed adhesive failure, and JE group, LE group and ZE group showed cohesive failure. Conclusion: For IPS e.max ceram, the shear bond strength value was highest for all kinds of zirconia blocks. For ICE Zirkon transluzent, the shear bond strength value was highest for all kinds of veneering ceramics. Most of experimental group interfaces revealed mixed failure mode.
zirconia coping;veneering ceramic;shear bond strength;failure mode;
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