Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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The Study of Flexural Strength of Full Zirconia Crown using Block after Clinical Work

Full Zirconia Crown용으로 사용되는 block의 제조사의 굴곡강도와 임상작업후의 굴곡강도에 관한 연구

  • 정효경 (대구보건대학교 치기공과) ;
  • 곽동주 (대구보건대학교 치기공과)
  • Received : 2011.10.26
  • Accepted : 2011.12.28
  • Published : 2011.12.30
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Abstract

Purpose: The purpose of this study was to evaluate flexural strength of full zirconia crown using block after clinical work. Methods: The three point bending test was used to measure the flexural strength of zirconia block. Statistical analysis was done using the Statistical Package for Social Sciences version 19.0 for Windows. As for the analysis methods, the study used analysis of variance, Tukey's test. Results: The ave Rage value of flexural strengths of WIELAND, Zirkonzahn, Hass, D-MAX were 516.2 MPa, 612.6MPa, 566.2MPa, 744.6MPa. The ave Rage value of Surface Roughness of WIELAND, Zirkonzahn, Hass, D-MAX were 0.39Ra, 0.33Ra, 0.33Ra, 0.47Ra. Conclusion: Flexural strength of zirconia block decreased after clinical work. Flexural strength of zirconia block is equal to or higher than flexural strength of dental metal, so zirconia block can be used as dental material.

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