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. 2022 Oct 28;14(5):324–333. doi: 10.4047/jap.2022.14.5.324

Fig. 3. The mean ΔE values of 0.8 mm specimens on each backgrounds. Acceptability threshold (5.5) and perceptibility threshold (2.6) are shown on the graph.

Fig. 3

ΔE - color difference between the specimens on the A2 shade background and the same specimen on the other backgrounds.

3Y (3 mol% yttria tetragonal zirconia polycrystals), 4Y (4 mol% yttria partially stabilized zirconia), 5.5Y (5.5 mol% yttria partially stabilized zirconia), LS (lithium disilicate).

A2 - A2 shade composite resin , ND3 and ND9-tooth-colored resin substrates to imitate standard dentin (ND3) and severely discolored dentin (ND9), Ti -milled Ti-6Al-4V alloy to imitate titanium abutment.