소결 전 지르코니아 표면처리와 라이너 사용에 따른 지르코니아와 열가압성형도재의 전단결합강도
Effects of Pre-Sintering Surface Treatment and Liner Application on the Shear Bond Strength of Zirconia and Pressable Ceramic
소속 상세정보
이광영:Lee Gwang-Young
조미향:Cho Mi-Hyang/최성민:Choi Sung-Min
KMID : 0362120150370030121
Abstract
Purpose: This study was intended to investigate the effect of applying liner for chemical bonding and physical surface roughness created on zirconia by using a sandpaper before sintering on the bond strength between the two materials.
Methods: Zirconia blocks were cut using a low-speed cutter. Plate-shaped specimen(6㎜×6㎜×3㎜) was fabricated by sintering after giving surface roughness according to four kinds of sandpapers. Depending on whether or not to use liner, 60 specimens were divided into two groups ZN(non-liner), ZL(liner), and the two groups were subdivided into four groups respectively in accordance with sandpaper used, totaling eight groups(n=10). The surface roughness (Ra) values and shapes before sintering were observed, and shear bond strength after pressing ceramic plasticity was measured with a universal testing machine. For a test of the significance, a one-way ANOVA was performed, and Tukey’s multiple comparison test was conducted.
Results: The observation of the surface roughness was SB04(2.22±1.16㎛), SB08(2.98±0.33㎛), SB12(2.44± 1.32㎛), SB20(2.34±0.59㎛) and SA04(2.34±0.67㎛), SA08(1.28±0.90㎛), SA12(2.03±1.60㎛), SA20(2.19 ±1.73㎛). In the case of ZN Group, the shear bond strength was ZN04(23.26±3.83㎫), ZN08(21.76±2.33㎫), ZN12(20.49±3.01㎫), ZN20(24.98±4.22㎫) (p<0.05). As for ZL Group, the shear bond strength was ZL04(25.09±5.67㎫), ZL08(22.98±2.26㎫), ZL12(21.54±5.70㎫), ZL20(23.98±3.23㎫) (p<0.05).
Conclusion: The research results showed that the bond strength of Zirconia core and Pressing ceramic was further improved by physical surface treatment before sintering, rather than by chemical bonding through liner surface treatment.
키워드
zirconia; shear bonding strength; surface treatment; pressing ceramics
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