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. 2018 Apr 26;13(4):e0196305. doi: 10.1371/journal.pone.0196305

Fig 2. Spectrophotometric color measurements (L*, a*, b*, WI and YI) in control teeth and those heated at 100, 200, or 400°C for 60 minutes.

Fig 2

Histograms represent means ± SEM (n = 10). ANOVA: **/***p<0.01/0.001 vs. control group, ##/###p<0.01/0.001 vs. 100°C, $ $ $p<0.001 vs. 200°C.