Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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Shear Bond Strength of Zirconia and Ceramics according to Dental Zirconia Surface Treatment

치과용 지르코니아 표면처리방법에 따른 지르코니아와 전장용 도재의 결합강도 관찰

  • Lee, Gwang-Young (Department of Dental Laboratory Technology, Wonkwang Health Science University) ;
  • Choi, Sung-Min (Department of Dental Laboratory Technology, Catholic University of Pusan)
  • 이광영 (원광보건대학교 치기공과) ;
  • 최성민 (부산가톨릭대학교 치기공학과)
  • Received : 2019.10.31
  • Accepted : 2019.12.27
  • Published : 2019.12.30
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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 (6mm × 6mm × 3mm). 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 MPa, AT 23.27 MPa, ST 21.27 MPa, ET 21.09 MPa, CN 16.12 MPa 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.

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References

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