fig1
![A comparative study of different bleaching techniques, regarding the color change, stability and postoperative hypersensitivity: a randomized controlled clinical trial](https://image.oaes.cc/f1eaadd4-e4fa-419f-a38f-79efc6c94a2a/2523.fig.1.png)
Figure 1. Bar chart representing mean values for (ΔE) of the three bleaching techniques
Figure 1. Bar chart representing mean values for (ΔE) of the three bleaching techniques
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