Color Stability, Chemico-Physical and Optical Features of the Most Common PETG and PU Based Orthodontic Aligners for Clear Aligner Therapy
Abstract
:1. Introduction
2. Materials and Methods
2.1. The Aligners and Their Physico-Chemical Characterization
2.2. Absorption Measurement of Water, Artificial Saliva and Staining Agents
3. Results
3.1. Physico-Chemical Characterization, Optical Features, and Color Stability of the As-Received Clear Aligners
3.2. Characterization Studies, Color Stability and Optical Properties of the Aligners after the Immersion into Staining Agents
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Acknowledgments
Conflicts of Interest
References
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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 |
National Bureau of Standards Units | Descriptions of Color Changes | NBS = 0.92 × ΔE* |
0.0–0.5 | Trace. Extremely slight change | |
0.5–1.5 | Slight. Slight change | |
1.5–3.0 | Noticeable. Perceivable | |
3.0–6.0 | Appreciable. Marked change | |
6.0–12.0 | Much. Extremely marked change | |
12.0 or more | Very much. Change to other color |
EK Aligner | EP Aligner | GA Aligner | ZN Aligner | IL Aligner | |
---|---|---|---|---|---|
Full Width at half maximum (FWHM) (°2θ) | 11.315 | 9.188 | 10.345 | 7.727 | 9.833 |
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Daniele, V.; Macera, L.; Taglieri, G.; Spera, L.; Marzo, G.; Quinzi, V. Color Stability, Chemico-Physical and Optical Features of the Most Common PETG and PU Based Orthodontic Aligners for Clear Aligner Therapy. Polymers 2022, 14, 14. https://doi.org/10.3390/polym14010014
Daniele V, Macera L, Taglieri G, Spera L, Marzo G, Quinzi V. Color Stability, Chemico-Physical and Optical Features of the Most Common PETG and PU Based Orthodontic Aligners for Clear Aligner Therapy. Polymers. 2022; 14(1):14. https://doi.org/10.3390/polym14010014
Chicago/Turabian StyleDaniele, Valeria, Ludovico Macera, Giuliana Taglieri, Loredana Spera, Giuseppe Marzo, and Vincenzo Quinzi. 2022. "Color Stability, Chemico-Physical and Optical Features of the Most Common PETG and PU Based Orthodontic Aligners for Clear Aligner Therapy" Polymers 14, no. 1: 14. https://doi.org/10.3390/polym14010014