Journal of Korean society of Dental Hygiene (한국치위생학회지)

Korean Society of Dental Hygiene (한국치위생학회)
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Effect of CAD/CAM ceramic thickness on shade

CAD/CAM 세라믹의 두께가 색조에 미치는 영향

  • Kang, Wol (Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University) ;
  • Han, Man-So (Department of Dental Technology, Daejeon Health University) ;
  • Kim, Ji-Hwan (Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University)
  • 강월 (고려대학교 대학원 보건과학과 치의기공전공) ;
  • 한만소 (대전보건대학교 치기공과) ;
  • 김지환 (고려대학교 대학원 보건과학과 치의기공전공)
  • Received : 2016.07.14
  • Accepted : 2016.10.05
  • Published : 2016.10.31
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Abstract

Objectives: The purpose of the study was to investigate the effect of CAD/CAM ceramic thickness on shade. Methods: 24 disk-shaped ceramic specimens (E.Max CAD & Empress CAD, $12mm{\times}12mm$) were prepared and divided into 4 groups (n=6). Ceramic specimens in 2 thicknesses (0.8 mm, 1.0 mm) were made low translucency(LT) shade A2. All specimens were measured as L*, a*, b* using spectrophotometer. The color differences(${\Delta}E$ values) between the specimen and a control target block ($12{\times}12{\times}1.2mm$) were calculated. Two-way ANOVA performed between 2 groups(material and thickness). Results: As the thickness increased, the $L^*$ (for all groups) and $b^*$ value (for all groups) increased and the $a^*$ value(for LR group) decreased. The mean color differences caused by thickness was acceptible (${\Delta}E$ > 2) for group LD1. But the mean color differences by thickness were not selected (${\Delta}E$ < 2) for group LD2, LR1, LR2. Conclusions: The different thickness can influence the final color of CAD/CAM ceramic.

Keywords

References

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