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치과용 지르코니아 표면처리방법에 따른 지르코니아와 전장용 도재의 결합강도 관찰

Shear Bond Strength of Zirconia and Ceramics according to Dental Zirconia Surface Treatment

대한치과기공학회지 2019년 41권 4호 p.279 ~ 286
이광영 ( Lee Gwang-Young ) - 원광보건대학교 치기공과

최성민 ( Choi Sung-Min ) - 부산가톨릭대학교 치기공학과

Abstract


Purpose: The dental CAD / CAM system has been popular with the development of the digital dental industry. Zirconia is a typical material in dental CAD / CAM systems. Zirconia crowns are classified into single layer and double layer. This study is about the double layer crown of zirconia. The surface roughness, bond strength and fracture patterns of the zirconia surface were observed.

Methods: Zirconia blocks were cut using a low speed cutter. Sintered to form a plate shape (6 mm × 6 mm × 3 mm). The prepared specimens were surface treated in four ways. Surface roughness and bond strength were measured. And the fracture pattern was observed.

Results: Result of surface treatment of zirconia. The surface roughness test results were as ET 2.87 ㎛, ST 2.67 ㎛, LT 2.44㎛, AT 2.41 ㎛, CN 2.08 ㎛ order. Bond Strength results were as LT 25.09 ㎫, AT 23.27 ㎫, ST 21.27 ㎫, ET 21.09 ㎫, CN 16.12 ㎫ order. Fracture patterns showed cohesive failure of 25-50% of the bond area.

Conclusion: Surface roughness, bond strength and fracture pattern of the zirconia surface were observed. Etching the surface treatment of zirconia materials has been shown to affect the surface roughness. Zirconia special binder treatment has been shown to affect the bond strength improvement.

키워드

Ceramics; Shear bonding strength; Surface treatment; Zirconia
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