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KMID : 0362420180560040269
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Journal of Korean Academy of Prosthodontics
2018 Volume.56 No. 4 p.269 ~ p.277
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Effect of glass-infiltration treatments on the shear bond strength between zirconia and ultra low-fusing porcelain veneer
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Yim Eun-Kyung
Park Sang-Won
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Abstract
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Purpose: This study examined the effects of glass infiltration treatments on the shear bond strength (SBS) between zirconia core and ultra low-fusing porcelain veneer.
Materials and methods: The zirconia specimens were classified into 4 groups (n = 12): Untreated zirconia (group Z), zirconia coated ZirLiner (group ZL), glass-infiltrated zirconia (group ZG), glass-infiltrated and sandblasted zirconia (group ZGS). A cylinder of ultra low-fusing veneer porcelain was build up on each disk (6 mm × 3 mm). SBS was measured using a universal testing machine. Scanning electron microscope and Energy Dispersive X-ray spectroscopy were used to evaluate the surface of zirconia and failure pattern after SBS.
Results: SBS value of group ZGS was significantly lower than that of other groups (P < .05). No significant differences were detected among group ZL, group Z and group ZG.
Conclusion: Glass infiltration is not effective to the bond strength between zirconia and ultra low-fusing porcelain veneer. Sandblasting also dramatically decreased the bonding strength.
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KEYWORD
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Glass infiltrated zirconia, Ultra low-fusing porcelain, Sandblasting, Shear bond strength, Failure pattern
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