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. Author manuscript; available in PMC: 2012 Jun 1.
Published in final edited form as: Dent Mater. 2011 Mar 8;27(6):509–519. doi: 10.1016/j.dental.2011.01.006

Table 4.

Results for refractive index and translucency of the nanogel-modified resins

Nanogel fraction, wt% Refractive index*
 Relative optical clarity#
Non-Reactive Reactive Monomer Polymer
0 1.4603 1.000 (0.003)A,a 0.869 (0.003)B,a
5 1.4628 1.4625 - -
10 1.4655 1.4650 - -
20 1.4711 1.4698 0.874 (0.006)A,b 0.770 (0.002)B,b
30 1.4749 1.4742 - -
40 1.4823 1.4800 0.822 (0.005)A,c 0.738 (0.003) B,c
*

Refractive index at 23°C.

#

Relative optical clarity as compared with unmodified TEGDMA monomer. Upper case letters indicate statistical differences between analogous nanogel concentrations within a row (paired t-test, α=5%). Lower case letters indicate statistical difference within a column (Tukey’s test, α=5%).