샌드블라스팅과 프라이머가 지르코니아와 레진시멘트의 전단결합강도에 미치는 영향
Influence of sandblasting and primer on shear bond strength of resin cement to zirconia
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연구 목적: 최근 지르코니아가 전부도재관의 코어로 많이 사용되고 있다. 지르코니아와 레진 시멘트의 결합 강도를 높이기 위한 기계적, 화학적인 표면 처리 방법들이 연구되고 있다. 이 연구에서 여러 표면 처리 방법에 따른 지르코니아와 레진 시멘트의 전단결합강도를 알아보고자 한다. 연구 재료 및 방법: 80개의 지르코니아 (Lava, 3M ESPE, St. Paul, MN, USA) 시편과 80개의 지르코니아/알루미나 복합체 (Zirace, Acucera Co Inc, Korea) 시편을 디스크형태로 제작하여 에폭시레진에 매립하였다. 이들을 각각 4개의 군으로 나누어 50 μm Al_2O_3 sandblasting, 110 μm Al_2O_3 sandblasting, 50 μm Al_2O_3 sandblasting과 프라이머 (Z-PRIME Plus, Bisco Inc, Schaumburg, IL, USA) 사용, 110 μm Al_2O_3 sandblasting과 프라이머 (Z-PRIME Plus) 사용 군으로 나누었다. 표면 처리한 지르코니아 표면에 2가지 레진 시멘 (Calibra, Panavia F)으로 접착하였다. 그 후 증류수 (37℃)에 24시간 보관 후 전단 결합 강도 실험을 시행하였고, SEM을 사용하여 표면 처리한 표면과 전단강도 실험 후 파절양상을 관찰하였다. 결과: ANOVA분석에 따르면, 두 가지 종류의 시편 모두에서, 프라이머 (Z-PRIME Plus)를 사용하여 표면 처리한 군들이 전단 결합 강도가 높았다 (P< .05). 결론: 기계적 결합 강도와 함께 새로운 프라이머를 사용하는 것이 지르코니아와 레진 시멘트의 접착 강도를 증가시킨다.
Abstract
PURPOSE: The aim of this study was to evaluate the effect of mechanical, chemical surface treatments on the zirconia-to-resin cement shear bond strength (SBS). MATERIALS AND METHODS: Eighty zirconia discs (Lava, 3M ESPE) and eighty zirconia/alumina composite (Zirace, Acucera) were embedded in an epoxy resin base. Zirconia discs were randomly divided in to four treatment groups(10 for each manufacturer): 50 μm Al_2O_3 sandblasting (S50), 110 μm Al_2O_3 sandblasting (S110), 50 μm Al_2O_3 and primer (Z-Prime Plus, Bisco Inc) (S50z) and 110 μm Al_2O_3 and primer (Z-Prime Plus) (S110z). Two resin-based luting cements (Calibra, Panavia F) were used to build 2 mmdiameter cylinders onto the zirconia. After 24 h of storage in water, SBS testing was evaluate using a universal testing machine. Bond strength data were analyzed with one-way ANOVA, two-way ANOVA test and post hoc comparison was done using Tukey test (α= .05). RESULTS: Groups using primer showed the high shear bond strength. The groups that did not use primer presented lower shear bond strengths. CONCLUSION: The use of primer (Z-Prime Plus, Bisco) had significantly higher shear bond strengths.
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