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Colour stability of 3D-Printed orthodontic brackets using filled resins
Richard Wallach1, Jeryl D English1, Audrey Moon1
1Department of Orthodontics, School of Dentistry, The University of Texas Health Science Center at Houston, Houston, Texas, USA.
Orthodontics & Craniofacial Research
|April 24, 2023
Summary
3D-printed resins for orthodontic brackets showed significant color and translucency changes when exposed to coffee, red wine, and tea. Accelerated aging caused minimal changes, impacting aesthetic bracket suitability.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials
Background:
- 3D-printed resins offer potential for fabricating custom orthodontic brackets.
- Assessing the color stability of these resins is crucial for aesthetic applications.
Purpose of the Study:
- To evaluate the color stability of 3D-printed resins used for orthodontic brackets.
- To determine the impact of common beverages and accelerated aging on resin color and translucency.
Main Methods:
- Resin discs were 3D printed and post-processed.
- Samples were immersed in coffee, tea, red wine, or distilled water for 7 days.
- Accelerated aging was performed per ISO Standard 4892-2.
- Color and translucency changes were measured using a spectrophotometer and CIEDE2000 formula.
Main Results:
- All tested 3D-printed resins exhibited significant color and translucency alterations.
- Red wine and coffee caused the most substantial changes.
- Tea also induced noticeable color shifts.
- Accelerated aging resulted in the least color and translucency change.
Conclusions:
- 3D-printed resins for orthodontic brackets are susceptible to color and translucency changes from common staining agents.
- These changes may compromise the aesthetic acceptability of 3D-printed resins for orthodontic bracket fabrication.
