Table 1.
The considered clear aligners in terms of manufacturer and polymer-based composition, as evidenced in the material safety data sheets.
| Samples Denomination |
Product Name (Manufacturer) | Polymer-Based Composition |
|---|---|---|
| EP | Essix ACE Plastic (Dentsply Sirona, York, PA, USA) | PET |
| EK | Erkodur (Erkodent Erich Kopp GmbH, Pfalzgrafenweiler, Deutschland) | PET |
| GA | Ghost Aligner (BART MEDICAL S.r.l., Mezzano, Italy) | PET |
| ZN | Zendura FLX (Zendura, Bay Materials LLC, Fremont, CA, USA) | Polyurethane (PU) system |
| IL | Invisalign (Align Technology, Inc. San Jose, CA, USA) |
Mostly PU |