Effect of modeling liquid on the shear-bond strength of zirconia core - porcelain veneer
도재 전용액이 지르코니아 코어-도재 비니어의 전단결합강도에 미치는 영향

Byung-Hwan Choi, Im-Sun Kim
2014 Journal of Korean Acedemy of Dental Technology  
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: 12.0 ; height: 3.0 ) 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
more » ... article abrasion with 110-Al2O3(AD)with distilled water; group 4 -airborne particle abrasion with 110-Al2O3 with modeling liquid(AM); group 5 -liner with distilled water(LD); group 6£≠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, 3 high and 2.8 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 0.50 /min until failure. The fractured zirconia surfaces were evaluated by using stereomicroscope ( 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 5.4 ) and LD showed the lowest value(6.7 1.3 ). 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 3.8 ) and ZD was the lowest shear bond strength(24.8 4.9 ). 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. [Abstract] 성 명
doi:10.14347/kadt.2014.36.2.83 fatcat:r7wramwyerhh5d3ermphuavmq4