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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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Purpose: This study is to evaluate the effect of modeling liquid on the shear-bond strength between zirconia core and veneering ceramic. Methods: Disk-shaped (diameter: 12.0mm; height: 3.0mm) zirconia were randomly divided into six groups according to the surface conditioning method and whether modeling liquid is used or not to be applied (N=60, n=10 per group): group 1-control group with distilled water(ZD); group 2-control group with modeling liquid(ZM); group 3-airborne particle abrasion with $110-{\mu}m$ $Al_2O_3$(AD) with distilled water; group 4-airborne particle abrasion with $110-{\mu}m$ $Al_2O_3$ with modeling liquid(AM); group 5-liner with distilled water(LD); group $6{\pounds}{\neq}liner$ with modeling liquid(LM). Contact angles were determined by the sessile drop method at room temperature using a contact angle measurement apparatus. The specimens were prepared using dentin veneering ceramics, veneered, 3mm high and 2.8mm in diameter, over the cores. The shear bond strength test was performed in a Shear bond test machine. Load was applied at a cross-head speed of 0.50mm/min until failure. The fractured zirconia surfaces were evaluated by using stereomicroscope (${\times}30$). Collected data were analyzed using SPSS(Statistical Package for Social Sciences) Win 12.0 statistics program. Results: ZD showed the highest contact angle($50.6{\pm}5.4^{\circ}$) and LD showed the lowest value($6.7{\pm}1.3^{\circ}$). Control groups and zirconia liner groups were significantly higher contact angle than liner groups(p<0.05). LD was the highest shear bond strength($43.9{\pm}3.8MPa$) and ZD was the lowest shear bond strength($24.8{\pm}4.9MPa$). Shear bond strengths of control groups and contact angle of liner groups were not significantly different((p>0.05). Liner groups presented adhesive failures. The others groups showed cohesive and adhesive failures. Conclusion: Modeling liquid groups showed lower contact angles and lower shear bond strength compared to those of distilled water groups.
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참고문헌 (10)
참고문헌 신청
Aboushelib MN / 2006 / Microtensile bond strength of different components of core veneered allceramic restorations. Part Ⅱ: Zirconia veneering ceramics / Dent Mater 22:857~863
Daftary F / 1986 / Effect of four pretreatment techniques on porcelain-to-metal bond strength / J Prosthet Dent 58:535~540
Dundar M / 2007 / Comparison of two bond strength testing methodologies for bilayered all-ceramics / Dent Mater 23:630~636
Harding AB / 2012 / The effect of surface treatment of the interfacial surface on fatigue-related microtensile bond strength of milled zirconia to veneering porcelain / J Prosthodont 21(5):346~352
Jens Fischer / 2008 / Effect of zirconia surface treatments on the shear strength of zirconia/veneering ceramic composites / Dent Mater J 27(3):448~454
Daftary F / 1986 / Effect of four pretreatment techniques on porcelain-to-metal bond strength / J Prosthet Dent 58:535~540
Dundar M / 2007 / Comparison of two bond strength testing methodologies for bilayered all-ceramics / Dent Mater 23:630~636
Harding AB / 2012 / The effect of surface treatment of the interfacial surface on fatigue-related microtensile bond strength of milled zirconia to veneering porcelain / J Prosthodont 21(5):346~352
Jens Fischer / 2008 / Effect of zirconia surface treatments on the shear strength of zirconia/veneering ceramic composites / Dent Mater J 27(3):448~454
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