Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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A Study on the Fracture Strength of the Cement Gap

Cement Gap에 따른 Zirconia Crown의 파절강도 비교

  • Kim, Nam-Joong (Department of Dental Technology & Science, Shinhan University) ;
  • Lee, Chung-Jae (Department of Dental Technology & Science, Shinhan University) ;
  • Kwak, Woon-Seon (Department of Oral Health Graduate School of Public Health & Social Welfare Dankook University)
  • 김남중 (신한대학교 치기공학과) ;
  • 이청재 (신한대학교 치기공학과) ;
  • 곽운선 (단국대학교 보건복지대학원 구강보건학과)
  • Received : 2016.10.31
  • Accepted : 2016.12.23
  • Published : 2016.12.30
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Abstract

Purpose: This research is conducted for better clinical test of Zirconia as we find out the fracture strength difference of Zirconia on cement gaps of full Crown that made use of Zirconia which is somewhat being used in recent dental technology. Methods: We produced each nine of Zirconia Crown of Zirconia fracture cement gaps A group(0.03 mm), B group(0.05 mm), C group(0.08 mm) on cement gaps by use of CAD/CAM, and compared the results. We could end up getting conclusions as following. Results: There was fracture strength difference per cement gaps but no impact(P<0.05). There was difference between $1.962{\pm}0.259$ from group A and $2.005{\pm}0.367$ from group B, but no impact(P<0.05). There was difference between $1.962{\pm}0.259$ from group A and $2.478{\pm}0.331$ from group C, but it's hard to be considered as an impact(P<0.05). Conclusion: Because of the hight pressure 0.08 mm is fractured and Margin has a lot of empty space due to gap for 0.08 mm. To identify the difference between 0.08 mm and 0.05 mm, 0.08 mm is selected as a gap. Therefore when it comes to using 0.05 mm authentically 0.05 mm is quite practical to use as a gap.

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References

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