ArticleScientific reports2024
Evaluation of the effects of temperature and centrifugation time on elimination of uncured resin from 3D-printed dental aligners.
Article in Scientific reports, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
20 citing papers in PubMed.
- Article
- Functionalization of a Shape-Memory 3D-Printed Clear Aligner Resin with Silanized Chitosan Nanoparticles: Antibacterial, Optical, Polymerization, and Mechanical Evaluation.Journal of functional biomaterials · 2026Article
- Towards standardizing cytotoxicity testing of 3D-printed orthodontic aligners and retainers: a scoping review.Progress in orthodontics · 2026Article
- Potential Cytotoxicity of Orthodontic Aligners in the Oral Environment: A Scoping Review.Materials (Basel, Switzerland) · 2026Review
- Dimensional behaviors of direct-printed versus thermoformed clear retainers in relation to changes of inter-piece occlusal contact distribution measured by T-scan after intraoral aging: a prospective clinical study.Progress in orthodontics · 2026Article
- Next-Generation Orthodontics: Functional Resins, Biomechanics, Biocompatibility, and Current Clinical Reality of Direct 3D-Printed Aligners.Journal of functional biomaterials · 2026Review
- Mechanical properties of thermoformed and direct-printed aligner materials after immersion in 37 °C water: a 14-day in vitro study.Scientific reports · 2026Article
- Health and environmental hazards of shape memory polymer used in orthodontic aligners - a scoping review.Biomaterial investigations in dentistry · 2026Review
- Spectrophotometric, Periodontal and Subjective Evaluations on Five Different Products for Clear Aligners Cleansing: Randomised Clinical Trial.International journal of dentistry · 2026Article
- Evaluation of the Dimensional Accuracy of 3D-Printed Aligners: An In Vitro Study Using Reverse Engineering Analysis.Journal of functional biomaterials · 2025Article
- Biocompatibility and Safety of 3D Printing Resins for Orthodontic Aligners: A Critical Review of Current Evidence.Polymers · 2025Review
- Effect of Surface Wettability and Energy on Bacterial Adhesion to Dental Aligners: A Comparative In Vitro Study.Bioengineering (Basel, Switzerland) · 2025Article
- Article
- Cytotoxicity of Printed Aligners: A Systematic Review.Dentistry journal · 2025Review
- Thermoplastics for Clear Aligners: A Review.Polymers · 2025Review
- Impact of various cleaning protocols on the physical and aesthetic properties of 3D-printed orthodontic aligners.Scientific reports · 2025Article
- Influence of Printing Orientation on Surface Roughness and Gloss of 3D Printed Resins for Orthodontic Devices.Materials (Basel, Switzerland) · 2025Article
- Effect of post-processing on the surface, optical, mechanical, and dimensional properties of 3D-printed orthodontic clear retainers.Clinical oral investigations · 2025Article
- 4D-Printed Smart Materials in Clear Aligner Fabrication: A Comprehensive Review :.Galen medical journal · 2025Review
- Review
Corrections and comments
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Authors and funding
10 authors.
Funding
Abstract
The study investigated the effects of temperature and centrifugation time on the efficacy of removing uncured resin from 3D-printed clear aligners. Using a photo-polymerizable polyurethane resin (Tera Harz TC-85, Graphy Inc., Seoul, Korea), aligners were printed and subjected to cleaning processes using isopropyl alcohol (IPA) or centrifugation (g-force 27.95g) at room temperature (RT, 23 °C) and high temperature (HT, 55 °C) for 2, 4, and 6 min. The control group received no treatment (NT). Cleaning efficiency was assessed through rheological analysis, weight measurement, transparency evaluation, SEM imaging, 3D geometry evaluation, stress relaxation, and cell viability tests. Results showed increased temperature and longer centrifugation times significantly reduced aligner viscosity, weight (P < 0.05), and transmittance. IPA-cleaned aligners exhibited significantly lower transparency and rougher surfaces in SEM images. All groups met ISO biocompatibility standards in cytotoxicity tests. The NT group had higher root mean square (RMS) values, indicating greater deviation from the original design. Stress relaxation tests revealed over 95% recovery in all groups after 60 min. The findings suggest that a 2-min HT centrifugation process effectively removes uncured resin without significantly impacting the aligners' physical and optical properties, making it a clinically viable option.
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Registered trials
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