지르코니아 세라믹의 표면처리에 따른 치과용 접착제의 전단결합강도
The effect of surface treatment conditioning on shear bond strength between zirconia and dental resin cements
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초록
연구 목적: 이 연구의 목적은 지르코니아 표면처리에 따른 3종의 레진시멘트와 지르코니아의 전단결합강도를 평가하기 위함이다. 연구 재료 및 방법: 총 143개의 디스크 모양의 지르코니아 블록(HASS Co., Gangneung, Korea) 시편을 제작하고 총 13개군(n=11)으로 나누었다. 그 중 9개군은 표면처리 방식(1. 알루미나 분사, 2. 알루미나 분사와 지르코니아 라이너의 도포, 3. 알루미나 분사와 Rocatec (3M ESPE, Seefeld, Germany) 처리) 및 사용한 3종류의 레진시멘트(Bistite II (Tokuyama Dental Co., Japan), Panavia F2.0 (Kuraray Medical, Japan), Super-bond C&B (Sun Medical, Japan))에 따라 나누어 열순환처리 전 접착강도 실험을 시행하였다. 열순환처리 전 접착강도 실험은 위 3종류의 레진시멘트를 3가지 방법으로 표면처리한 지르코니아 시편에 접착하고, 상온의 증류수에 24시간 동안 보관한 후, 전단결합강도를 측정하였다. 열순환처리 후 접착강도 실험은, 열순환처리 전 접착강도 실험에서 우수한 전단결합강도를 보인 지르코니아 표면처리군(알루미나 분사와 Rocatec 처리를 하고 3종류의 레진시멘트를 접착한 3개의 군)과 대조군으로 알루미나만으로 표면처리 후 Super-bond C&B를 접착한 1개의 군을 대상으로 5℃와 55℃ 사이에서 5,000회 열순환처리를 시행하고 전단결합강도를 측정하였다. 결과: 열순환처리 전 접착강도 실험에서는 알루미나 분사와 Rocatec 처리를 한 지르코니아 표면에 Super-bond C&B를 접착한 군이 가장 높은 전단결합강도를 보였다. Super-bond C&B를 사용한 군이 다른 시멘트 군보다 유의성 있게 높은 전단결합강도를 보였으며, 지르코니아 표면에 Rocatec 처리를 한 군이 다른 표면처리를 한 군보다 유의성 있게 높은 전단결합강도를 보였다. 열순환처리를 한 후에는, Rocatec 처리를 한 지르코니아 표면에 Super-bond C&B를 접착한 군만이 유일하게 전단결합강도가 증가하였으며, 다른 모든 군에서는 전단결합강도가 감소하였다. 결론: 본 실험에서는 Super-bond C&B 시멘트가 가장 높은 전단결합강도를 보였으며, Rocatec 시스템은 레진시멘트와 지르코니아의 전단결합강도를 향상시키는 방법이 될 것이라고 사료된다.
Abstract
Purpose: The purpose of this study was to evaluate the effect of surface treatment on the shear bond strength of zirconia ceramic to 3 resin cements. Materials and methods: A total of 143 disk-shaped Zirconia blocks (HASS Co., Gangneung, Korea) were randomly divided into three treatment groups: (1) only 50 ㎛ Al2O3 sandblasting, (2) 50 ㎛ Al2O3 sandblast and zircona liner, (3) 50 ㎛ Al2O3 sandblasting and Rocatec (3M ESPE, Seefeld, Germany). Bistite II (Tokuyama Dental Co., Japan), Panavia F (Kuraray Medical, Japan), and Superbond C&B (Sun Medical, Japan) were used to cement onto the zirconia. After 24h of storage in distilled water, shear bond strength was evaluated. High value group was re-tested after thermocycling at 5,000 cycles(5-55℃). Shear bond strength data were analyzed with one-way ANOVA, two-way ANOVA test and Post Hoc Test (α=.05). Shear bond strength data before and after thermocycling were analyzed with Independent sample T test (α=.05). Results: Super-bond C&B treated with Rocatec showed the most high shear bond strength. Super-bond C&B groups resulted in significantly higher than other cement groups (P<.05). Rocatec groups resulted in significantly higher than other surface treatment groups (P<.05). Shear bond strength has increased in Panavia F treated with Zirconia liner (P<.05). After thermocycling, shear bond strength was increased in Super-bond C&B treated with Rocatec but decreased in other groups (P<.05). Conclusion: Super-bond C&B cement resulted the highest shear bond strength and Rocatec system enhanced the shear bond strength. After thermocycling, shear bond strength has decreased in most resin cements except Super-bond C&B treated with Rocatec.
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