Comparative color and surface parameters of current esthetic restorative CAD/CAM materials

PURPOSE. The purpose of this study was to derive and compare the inherent color (hue angle, chroma), translucency (TPSCI), 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 x 12 mm(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 CS > VE, whereas the order of chroma was VE > CS > LU. TPSCI results demonstrated a significant difference in terms of material types and material thicknesses (P CS > VE. Delta E*(SCE-SCI) and R-a results were significantly varied amongst the materials (P VE >= CS, whereas the order of R-a was CS >= VE > LU. CONCLUSION. Nano-ceramic and polymer-infiltrated-feldspathic ceramic-network CAD/CAM materials exhibited different optical, inherent color and surface parameters.