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

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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, 1 200-grit, 2 000-grit, and 4 000-grit SiC papers. The roughness parameter (R a) 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 R a on lightness (L*) was found. Lightness increased with decreases in roughness, except for specimens that underwent polishing procedure 4 (PP4; 500-grit, 1 200-grit, 2 000-grit, and 4 000-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, 1 200-grit, and 2 000-grit SiC papers consecutively) and PP4. Color difference (ΔE*) between the polishing procedures was within acceptability thresholds in dentistry.

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Authors and Affiliations

  1. Department of Optics, Faculty of Science, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain

    Razvan Ghinea, Laura Ugarte-Alvan, Ana Yebra & Maria del Mar Perez

  2. Department of Stomatology, Faculty of Odontology, University of Granada, Campus de Cartuja s/n, 18071, Granada, Spain

    Oscar E. Pecho

  3. Houston Center for Biomaterials and Biomimetics & Department of Restorative Dentistry and Biomaterials, University of Texas Dental Branch at Houston, Houston, TX, 77030, USA

    Rade D. Paravina & Maria del Mar Perez

Authors
  1. Razvan Ghinea
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  2. Laura Ugarte-Alvan
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  3. Ana Yebra
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  4. Oscar E. Pecho
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  5. Rade D. Paravina
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  6. Maria del Mar Perez
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Correspondence to Maria del Mar Perez.

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Project (No. MAT2009-09795) supported by the Spanish Ministry of Science and Innovation

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Ghinea, R., Ugarte-Alvan, L., Yebra, A. et al. Influence of surface roughness on the color of dental-resin composites. J. Zhejiang Univ. Sci. B 12, 552–562 (2011). https://doi.org/10.1631/jzus.B1000374

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  • DOI: https://doi.org/10.1631/jzus.B1000374

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