DOI QR코드

DOI QR Code

Effect of coloring agent dryness on zirconia color

치과용 지르코니아 착색제의 건조정도가 지르코니아 색조에 미치는 영향

  • Lee, Joo-Hee (Department of Dental Lab Technology, Daejeon Health Institute of Technology) ;
  • Park, Jin-Young (Institute for Health Science, Korea University) ;
  • Kim, Hae-Jung (Kim&Lee Inc.) ;
  • Moon, Yun Hee (School of Health Sciences, Dankook University) ;
  • Kim, Woong-Chul (Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University)
  • 이주희 (대전보건대학교 치기공학과) ;
  • 박진영 (고려대학교 보건과학연구소) ;
  • 김해중 ((주)킴엔리) ;
  • 문윤희 (단국대학교 보건과학대학) ;
  • 김웅철 (고려대학교 치기공학과)
  • Received : 2018.05.03
  • Accepted : 2018.08.03
  • Published : 2018.08.31

Abstract

One of the most important factor of esthetic prosthesis is the color of the teeth. Zirconia is produced in the process of design, milling, coloring, drying, and sintering. The effect of the drying degree of zirconia colorant on the color tone is examined. For the experiment, a total of 45 zirconia specimens(15 for each) were fabricated by using cad/cam system. The zirconia specimens(L block(LAZOR), Z block(Zircos-E block posterior), A block(AlphaZ)) were then subjected to zirconia sintering in accordance with the manufacturer's instructions, using a chemical coloring agent to Non-drying(0sec), intermediate (10sec), and completely dried (10min) temperature holding times. The color tone was measured using a spectrophotometer. The results were analyzed with a One-way analysis of variance and the Tukey post-hoc test (${\alpha}=.05$) The $L^*$ values of L, A specimens, $a^*$ values of A specimens, and $b^*$ values of Z specimens were not statistically different according to the degree of drying (p>0.05), While the $L^*$ value of Z specimen, $a^*$ value of L, Z specimen, $b^*$ values of L, A specimens were statistically different according to the degree of drying(p <0.05). In conclusion, the drying of zirconia colourants improves zirconia brightness and increases the optical properties of the enamel.

Keywords

Acid base coloring liquid;Coloring agent;Temperature dwelling time;Zirconia;Zirconia shade

Acknowledgement

Supported by : 중소벤처기업부

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