Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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The study on the color change according to zirconia core thickness, and build-up technique using spectrophotometer

Spectrophotometer를 이용한 지르코니아 코어의 두께 및 도재축성법에 따른 색조의 변화에 대한 연구

  • Huh, Sung-Yoon (Department of Dental Hygiene, Shingu University) ;
  • Kim, Jae-Hong (Department of Health Science Specialized in Dental Lab. Science & Engineering, Graduate School, Korea University) ;
  • Son, Ho-Jung (Medi-ocean)
  • 허성윤 (신구대학교 치위생과) ;
  • 김재홍 (고려대학교 대학원 보건과학과 치의기공전공) ;
  • 손호정 ((주)메디오션)
  • Received : 2011.10.31
  • Accepted : 2011.12.28
  • Published : 2011.12.30
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Abstract

Purpose: The purpose of this study was to compare color parameters of different fabrication method of Lava ceram powder, Lava DVS blocks, IPS e.max ceram and IPS e.max zirpress. Methods: The three available shades(A1, A2, A3.5) of Lava & Kavo zirconia blocks were examined. For each of three colors, three different thickness were tested, 5 times of measurement frequency. The measurements were made using a spectrophotometer equipped with an integrating sphere using the CIE $L^*$, $a^*$, $b^*$ colorimetric system. Results: Lava build-up group and Lava DVS group showed clinically perceived color difference, on the other hand IPS e.max build-up group and IPS e.max zirpress group did not show clinically perceived color difference to shade allowed on core. When the thickness of porcelain veneer increased from Lava and IPS e.max groups, color differences(${\Delta}E$) were decreased. Conclusion: All-ceramic system has color characteristics that clinicians have to consider when selecting materials. Also, manufacturers of different porcelain systems must make every effort to achieve color reproducibility.

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References

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