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. 2021 Dec 21;14(1):14. doi: 10.3390/polym14010014

Figure 7.

Figure 7

Figure 7

Absorbance curves of the aligners before (black line) and after (red line) 14 days of immersion in staining agents. (a) Erkodur (EK) in artificial saliva; (b) EK in nicotine; (c) EK in red wine; (d) EK in coffee; (e) Essix Plastic (EP) in artificial saliva; (f) EP in nicotine; (g) EP in red wine; (h) EP in coffee; (i) Ghost Aligner (GA) in artificial saliva; (j) GA in nicotine; (k) GA in red wine; (l) GA in coffee; (m) Zendura (ZN) in artificial saliva; (n) ZN in nicotine; (o) ZN in red wine; (p) ZN in coffee; (q) Invisalign (IL) in artificial saliva; (r) IL in nicotine; (s) IL in red wine; (t) IL in coffee.