S-Space College of Dentistry/School of Dentistry (치과대학/치의학대학원) Dept. of Dentistry (치의학과) Journal Papers (저널논문_치의학과)
Comparison of translucency between indirect and direct resin composites
- Woo, Si-Taek; Yu, Bin; Ahn, Jin-Soo; Lee, Yong-Keun
- Issue Date
- journal of dentistry 36(2008) 637–642
- Objectives: To measure the translucency of indirect and direct resin composites after curing,
and to determine the influence of material and shade group combination on these properties.
Methods: BelleGlass NG (BG, indirect resin composite) and Estelite Sigma (ES, direct resin
composite), each composed in three shade groups (EN, OD and TL for BG; BS, AS and OP for
ES) of 16 shades were investigated. Resin composite was packed into a mold (BEC) and was
cured with a light-curing unit (CWL). Secondary curing was performed in a proprietary
curing chamber (CIC) for BG material. Color was measured at the BEC, CWL and CIC
conditions in the CIELAB scale using a spectrophotometer. Translucency parameter (TP)
was calculated as the color difference between a specimen over a white and a black
Results: TP values before curing were in the range of 7.7 (BG-OD) to 16.9 (ES-AS), and those
after curing were in the range of 10.0 (BG-OD) to 21.5 (BG-EN). TP values of both materials
were influenced by curing ( p < 0.05). There were significant difference in the TP values by
the material and shade group combination, and the following homogenous subsets were
found based on Tukey multiple comparison test: BG-OD < ES-OP < BG-TL = ES-AS = ESBS
< BG-EN ( p < 0.05).
Conclusions: BG material showed a wider range of TP values than ES, which would improve
shade-matching capability of this material. Translucency should be considered when
neighboring teeth are treated with different types of resin composites.
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