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CLC number: R783.1

On-line Access: 2011-07-04

Received: 2010-10-26

Revision Accepted: 2011-04-06

Crosschecked: 2011-05-30

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Journal of Zhejiang University SCIENCE B 2011 Vol.12 No.7 P.552-562

http://doi.org/10.1631/jzus.B1000374


Influence of surface roughness on the color of dental-resin composites


Author(s):  Razvan Ghinea, Laura Ugarte-Alvan, Ana Yebra, Oscar E. Pecho, Rade D. Paravina, Maria del Mar Perez

Affiliation(s):  Department of Optics, Faculty of Science, University of Granada, Campus Fuentenueva s/n 18071, Granada, Spain, Department of Stomatology, Faculty of Odontology, University of Granada, Campus de Cartuja s/n 18071, Granada, Spain, Houston Center for Biomaterials and Biomimetics & Department of Restorative Dentistry and Biomaterials, University of Texas Dental Branch at Houston, Houston, TX 77030, USA

Corresponding email(s):   mmperez@ugr.es

Key Words:  Color measurement, Dental resin composites, Roughness


Razvan Ghinea, Laura Ugarte-Alvan, Ana Yebra, Oscar E. Pecho, Rade D. Paravina, Maria del Mar Perez. Influence of surface roughness on the color of dental-resin composites[J]. Journal of Zhejiang University Science B, 2011, 12(7): 552-562.

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author="Razvan Ghinea, Laura Ugarte-Alvan, Ana Yebra, Oscar E. Pecho, Rade D. Paravina, Maria del Mar Perez",
journal="Journal of Zhejiang University Science B",
volume="12",
number="7",
pages="552-562",
year="2011",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B1000374"
}

%0 Journal Article
%T Influence of surface roughness on the color of dental-resin composites
%A Razvan Ghinea
%A Laura Ugarte-Alvan
%A Ana Yebra
%A Oscar E. Pecho
%A Rade D. Paravina
%A Maria del Mar Perez
%J Journal of Zhejiang University SCIENCE B
%V 12
%N 7
%P 552-562
%@ 1673-1581
%D 2011
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1000374

TY - JOUR
T1 - Influence of surface roughness on the color of dental-resin composites
A1 - Razvan Ghinea
A1 - Laura Ugarte-Alvan
A1 - Ana Yebra
A1 - Oscar E. Pecho
A1 - Rade D. Paravina
A1 - Maria del Mar Perez
J0 - Journal of Zhejiang University Science B
VL - 12
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SP - 552
EP - 562
%@ 1673-1581
Y1 - 2011
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.B1000374


Abstract: 
This study deals with the influence of surface roughness on the color of resin composites. Ten resin composites (microfilled, hybrid, and microhybrid) were each polished with 500-grit, 1200-grit, 2000-grit, and 4000-grit SiC papers. The roughness parameter (Ra) was measured using a Plμ confocal microscope, and field-emission scanning electron microscope (Fe-SEM) images were used to investigate filler morphology. Color was measured using a spectroradiometer and a D65 standard illuminant (geometry diffuse/0° specular component excluded (SCE) mode). Surface roughness decreased with grit number and was not influenced by filler size or size distribution. A significant influence of Ra on lightness (L*) was found. Lightness increased with decreases in roughness, except for specimens that underwent polishing procedure 4 (PP4; 500-grit, 1200-grit, 2000-grit, and 4000-grit SiC papers consecutively). Generally, it was found that surface roughness influenced the color of resin composites. The composites that underwent PP1 (500-grit SiC paper) exhibited significant differences in chroma (C*), hue (h°), and lightness (L*) compared to composites that underwent PP3 (500-grit, 1200-grit, and 2000-grit SiC papers consecutively) and PP4. Color difference (∆E*) between the polishing procedures was within acceptability thresholds in dentistry.

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