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Translucency of ceramic veneers on glazing effect

세라믹 비니어의 글레이징에 따른 반투명도 변화

  • Kim, Sung-Joon (Department of Dentistry, School of Medicine, Jeju National University) ;
  • Kahm, Se Hoon (Department of Dentistry, School of Medicine, Jeju National University)
  • 김성준 (제주대학교 의학전문대학원 치과학교실) ;
  • 감세훈 (제주대학교 의학전문대학원 치과학교실)
  • Received : 2015.02.23
  • Accepted : 2015.04.08
  • Published : 2015.04.30

Abstract

Purpose: The aim of this study was to compare the translucency of two different laminate ceramic veneers with and without glazing. Materials and methods: Ten millimeter side square-shaped specimens in 0.3 mm and 0.6 mm thick were fabricated for the following materials with and without glazing (n=80): A1 shade IPS e.maxPress (IEM) and Styleveneers (STV). The color coordinates (CIE $L^*a^*b^*$) of the specimens were measured with a colorimeter. The Translucency parameter (TP) was calculated from the color difference of the material on a black versus a white background. For comparisons between materials and between the 'not glazed' and 'glazed' groups, unpaired t-test was used to analyze the data (P=.05). Results: The TP ($Mean{\pm}SD$) of 'not-glazed' and 'glazed' group of IEM specimens at 0.3 mm thickness were $45.99{\pm}3.00$ and $49.53{\pm}2.28$ and the TP at 0.6 mm thickness were $32.82{\pm}2.59$ and $43.02{\pm}0.98$, respectively. Likewise, the TP of 'not-glazed' and 'glazed' group of STV specimens at 0.3 mm thickness were $47.03{\pm}3.65$ and $50.95{\pm}3.05$ and the TP at 0.6 mm thickness group were $34.48{\pm}1.28$ and $43.39{\pm}1.20$, respectively. As the glazing of ceramic veneer differed, the TP of each ceramic veneer showed statistically significant difference. But, the result between the products was not statistically different. Conclusion: Within the limitations of this study, we are concluded that the glazing process changed translucency of laminate ceramic veneers and the TP would not be affected by products.

목적: 본 연구의 목적은 두 종의 라미네이트 세라믹 비니어의 글레이징 여부에 따른 반투명도 변화를 비교하는데 있다. 재료 및 방법: IPS e.maxPress (IEM)와 Styleveneers (STV)를 대상으로 하여 각각 0.3 mm와 0.6 mm 두께의 한 변이 10 mm인 정사각형 형태의 시편을 글레이징을 시행한 군과 하지 않은 군으로 나누어 제작하였다(n=80). 각 시편은 측색기를 이용하여 색좌표(CIE $L^*a^*b^*$)를 측정하였다. Translucency Parameter (TP)는 측정한 색차를 계산하여 얻었다. 각 제조사별 차이와, 글레이징 여부에 관한 통계 분석을 위해 독립표본 t-test를 시행하였다(P=.05). 결과: IEM의 0.3 mm 두께에서 TP값(평균${\pm}$표준편차)은 글레이징을 시행하지 않은 군에서 $45.99{\pm}3.00$, 글레이징을 시행한 군에서 $49.53{\pm}2.28$이었으며, 0.6 mm 두께에서는 각각 $32.82{\pm}2.59$$43.02{\pm}0.98$이었다. 마찬가지로, STV의 0.3 mm 두께에서 TP값은 글레이징을 시행하지 않은 군에서 $47.03{\pm}3.65$, 글레이징을 시행한 군에서 $50.95{\pm}3.05$이었으며, 0.6 mm 두께에서는 각각 $34.48{\pm}1.28$$43.39{\pm}1.20$이었다. 세라믹 비니어의 글레이징 여부에 따라, 세라믹 비니어의 TP값은 통계적으로 차이가 나타났다. 그러나 제조사간의 통계적 유의성은 없었다. 결론: 한계는 있지만, 본 연구에서, 라미네이트 세라믹 비니어는 글레이징 과정을 거치면 반투명도가 변화되며, 제조사간의 차이는 없다는 결론을 얻었다.

Keywords

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