The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Comparative color and surface parameters of current esthetic restorative CAD/CAM materials

  • Egilmez, Ferhan (Department of Prosthodontics, Faculty of Dentistry, Gazi University) ;
  • Ergun, Gulfem (Department of Prosthodontics, Faculty of Dentistry, Gazi University) ;
  • Cekic-Nagas, Isil (Department of Prosthodontics, Faculty of Dentistry, Gazi University) ;
  • Vallittu, Pekka Kalevi (Institute of Dentistry, Department of Biomaterials Science and Turku Clinical Biomaterials Centre) ;
  • Lassila, Lippo Veli Juhana (Institute of Dentistry, Department of Biomaterials Science and Turku Clinical Biomaterials Centre)
  • Received : 2017.04.04
  • Accepted : 2017.08.29
  • Published : 2018.02.28
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Abstract

PURPOSE. The purpose of this study was to derive and compare the inherent color (hue angle, chroma), translucency ($TP_{SCI}$), surface gloss (${\Delta}E^*_{SCE-SCI}$), and surface roughness ($R_a$) amongst selected shades and brands of three hybrid CAD/CAM blocks [GC Cerasmart (CS); Lava Ultimate (LU); Vita Enamic (VE)]. MATERIALS AND METHODS. The specimens (N = 225) were prepared into square-shaped ($12{\times}12mm^2$) with different thicknesses and shades. The measurements of color, translucency, and surface gloss were performed by a reflection spectrophotometer. The surface roughness and surface topography were assessed by white light interferometry. RESULTS. Results revealed that hue and chroma values were influenced by the material type, material shade, and material thickness (P < .001). The order of hue angle amongst the materials was LU > CS > VE, whereas the order of chroma was VE > CS > LU. $TP_{SCI}$ results demonstrated a significant difference in terms of material types and material thicknesses ($P{\leq}.001$). $TP_{SCI}$ values of the tested materials were ordered as LU > CS > VE. ${\Delta}E^*_{SCE-SCI}$ and $R_a$ results were significantly varied amongst the materials (P < .001) and amongst the shades (P < .05). The order of ${\Delta}E^*_{SCE-SCI}$ amongst the materials were as follows $LU>VE{\geq}CS$, whereas the order of $R_a$ was $CS{\geq}VE>LU$. CONCLUSION. Nano-ceramic and polymer-infiltrated-feldspathic ceramic-network CAD/CAM materials exhibited different optical, inherent color and surface parameters.

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