Influence of glass-based dental ceramic type and thickness with identical shade on the light transmittance and the degree of conversion of resin cement.
10.1038/s41368-017-0005-7
- Author:
Soram OH
1
;
Su-Mi SHIN
1
;
Hyun-Jung KIM
1
;
Janghyun PAEK
2
;
Sung-Joon KIM
3
;
Tai Hyun YOON
4
;
Sun-Young KIM
5
Author Information
1. Department of Conservative Dentistry, Graduate School, Kyung Hee University, Seoul, Korea.
2. Department of Prosthodontics, School of Dentistry, Kyung Hee University, Seoul, Korea.
3. Department of Dentistry, School of Medicine, Jeju National University, Jeju, Korea.
4. Department of Physics, Korea University, Seoul, Korea.
5. Department of Conservative Dentistry and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea. denkim@snu.ac.kr.
- Publication Type:Journal Article
- MeSH:
Aluminum Silicates;
Ceramics;
chemistry;
Color;
Dental Materials;
chemistry;
Dental Porcelain;
Light;
Materials Testing;
Resin Cements;
chemistry;
Spectroscopy, Fourier Transform Infrared;
Surface Properties
- From:
International Journal of Oral Science
2018;10(1):5-5
- CountryChina
- Language:English
-
Abstract:
The purpose of this study was to assess the influence of the types and thicknesses of glass ceramic plates on light transmittance and compare the degrees of conversion (DC) of resin cement under the ceramic materials. Three ceramic plates with thicknesses of 0.5, 1.0, 2.0, and 4.0 mm were fabricated from each of five commercial ceramic blocks in shade A2: high-translucency and low-translucency IPS Empress CAD (Emp_HT and Emp_LT); high-translucency and low-translucency IPS e.max CAD (Emx_HT and Emx_LT); and Vita Mark II (Vita). The translucency parameter was obtained using a colorimeter. The light transmittance rate was measured using a photodetector attached to an optical power meter. The DC of a resin cement (Variolink N) underneath the ceramic plates was examined by Fourier transform infrared spectroscopy. The translucency parameter, light transmittance rate, and DC showed significant differences by ceramic type and thickness (P < 0.05). The Emp_HT specimens showed the highest light transmission and DCs, and the Emx_LT showed the least light transmission and the lowest DCs. The high-translucency Empress showed significantly higher DCs than the low-translucency types (P < 0.05), but there was no significant difference in e.max (P > 0.05). Both type and thickness of the glass ceramics significantly influenced the light transmittance and DC of the light-cured resin cement beneath the ceramic of the same shade.
