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지르코니아의 거칠기 증가를 위한 다양한 표면처리방법이 레진시멘트와의 전단결합강도에 미치는 영향

Effects of various zirconia surface treatments for roughness on shear bond strength with resin cement

대한치과기공학회지 2020년 42권 4호 p.326 ~ 333
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Abstract


Purpose: The purpose of this study was to evaluate the effects of various zirconia surfacetreatment methods on shear bond strength with resin cements.

Methods: We prepared 120 cylindrical zirconia specimens (?10 mm×10 mm) using computer-aided design/computer-aided manufacturing (CAD/CAM). Each specimen was randomlysubjected to one of four surface treatment conditions: (1) no treatment (control), (2)airborne-particle abrasion with 50 μm of Al2O3 (A50), (3) airborne-particle abrasion with 125μm of Al2O3 (A125), and (4) ZrO2 slurry (ZA). Using a polytetrafluoroethylene mold (?6 mm×3mm), we applied three resin cements (Panavia F 2.0, Super-Bond C&B, and Variolink N) toeach specimen. The shear bond strength tests were performed in a universal testing machine.
The surfaces of representative specimens of each group were evaluated under scanningelectron microscope. We used one-way analysis of variance (ANOVA), two-way ANOVA,and post hoc Tukey honest significant difference test to analyze the data.

Results: In the surface treatment method, the A50 group showed the highest bond strength,followed by A125, ZA, and control groups; however, no significant difference was observedbetween A50 and A125, A125 and ZA, and ZA and control (p>0.05). Among the resin cements,Super-Bond C&B showed the highest shear bond strength, followed by Panavia F 2.0and Variolink N (p<0.05).

Conclusion: Within the limitations of this study, application of airborne-particle abrasion andZrO2 slurry improved the shear bond strength of resin cement on zirconia.

키워드

Resin cements; Roughness; Shear strength; Surface treatment; Zirconium oxide

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