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리튬디실리케이트 세라믹과 표면처리방법에 따른 라미네이트 베니어의 전단결합강도 비교

Comparison of Shear Bonding Strength of Laminate Veneer by Lithium Disilicate Ceramics and Surface Treatment Methods

대한치과기공학회지 2019년 41권 3호 p.177 ~ 185
박상준 ( Park Sang-Joon ) - 부산가톨릭대학교 보건과학대학 치기공학과

정인성 ( Chung In-Sung ) - 부산가톨릭대학교 보건과학대학 치기공학과

Abstract


Purpose: This study was to investigate the effect of three different surface treatments on the shear bond strength of lithium disilicate ceramics to enamel.

Methods: Totally 60 lithium disilicate ceramic disc specimens were fabricated with IPS e.max press (Ivoclar Vivadent, Schaan, Liechtenstein) and Mazic Claro (Vericom, Korea). 30 specimens in each lithium disilicate ceramic were assigned to 3 groups of the each following surface treatment: 1) 50㎛ airborne particle abrasion+silane, 2) 9.5% hydroflouric acid etching (HF)+silane, 3) 50㎛ airborne particle abrasion+9.5% HF+silane. Lithium disilicate ceramic surfaces after surface treatments were AFM examined. The shear bond strength was measured in a universal testing machine at 0.5mm/min crosshead speed. All data were analyzed using a two-way ANOVA and Tukey’s test(α=0.05).

Results: The mean surface roughness of lithium disilicate ceramics ranged from 0.178㎛ to 0.441㎛. The mean shear bond strengths ranged from 23.81±2.78 MPa to 33.99±4.85 MPa.

Conclusion: 1. Mazic Claro showed higher shear bond strength than IPS e.max press at 3 different surface treatments, and no statistically significant was observed. 2. The shear bond strength of IPS e.max press was strongly enhanced as surface treated with 50㎛ airborne particle abrasion and 9.5% hydroflouric acid etching. And there was no statistical significance at the shear bond strength of Mazic Claro with surface treatments.

키워드

lithium disilicate; surface treatments; shear bond strength; enamel
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