Optical properties and masking capacity of flowable giomers

Abstract

Background and aims. To assess the color, translucency and masking properties of novel flowable giomers.
 Methods. Three flowable giomers were used for the fabrication of 1-mm thick samples (n=126) in three consistencies (Beautifil flow Plus X F00; Beautifil flow F02; Beautifil flow Plus X F03, Shofu Dental Corporation, Japan) and two shades (A2 and A3). The relative spectral reflectance was recorded over white, black, C3, and a tested-sample colored background. Lightness (L*), and color coordinates a* and b*, Relative Translucency parameter (RTP00) and masking capacity of C3 background were calculated; differences in color and translucency were compared with thresholds for perceptibility and acceptability (PT and AT). Statistical analyses used significance tests for paired samples.
 Results. All tested materials displayed increased values of L*: for A2 F00=86.16(±0.86), F02=86.39(±0.63), F03=86.40(±0.63); for A3: F00=84.24(±0.58), F02=83.34(±0.3), F03=84.19(±0.4), as well as of RTP: for A2 F00=30.34(±0.88), F02=31.37(±0.94), F03=31.11(±1.15), for A3 F00=29.64(±1.64), F02=30.79(±1.02), F03=30.1(±1.26). For A2 samples, the masking capacity was significantly different for all materials, whilst for A3 there were differences only between F00-F03 and F02-F03.
 Conclusions. The tested flowable giomers proved high lightness and translucency. The color differences between the materials with the same designation were below the perceptibility threshold in most cases. In addition, the differences in relative translucency parameters ranged between the perceptibility and acceptability thresholds. All tested flowable giomers had an unacceptable masking capacity for a C3 background.

Water Sorption and Solubility of Flowable Giomers

“…However, to our knowledge, very few references are available in the literature about flowable giomers [ 3 , 9 , 10 ].…”

“…Optical properties of flowable giomers were found to be also correlated to the filler amount in each material. Overall, flowable giomers were determined to be highly translucent and having the low masking capacity of a dyschromic substrate [ 10 ]. Hydric degradation of a restoration material leads to a rougher surface, which in turn favors significant plaque deposits.…”

Research on the Mechanical Properties, Fluoride and Monomer Release of a New Experimental Flowable Giomer in Comparison to Three Commercial Flowable Giomers

“…To the best of our knowledge, very few references are available in literature regarding these materials [11][12][13]. Giomers were characterized regarding optical properties, translucency and masking capacity [12], water sorption and solubility [11,13].…”