ArticleEuropean journal of orthodontics2024
Surface alterations and compound release from aligner attachments in vitro.
Article in European journal of orthodontics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 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
7 citing papers in PubMed.
- Comparison between flowable and flowable bulk-fill composites in the manufacture of attachments for orthodontic aligners: a split-mouth randomized clinical trial.Clinical oral investigations · 2026Trial
- Effect of coffee solution on colour stability of various clear aligner attachment composites, does surface sealing make a difference?: An in vitro study.BMC oral health · 2026Article
- Rheological and Structural Evaluation of Dental Flowable Composites for Optimized Performance in Transparent Aligner Systems.Polymers · 2026Article
- Evaluation of wear amounts of different composite resin attachments used in clear aligner treatment over a 6-month period: a retrospective study.The Angle orthodontist · 2026Article
- Bruxism Simulation in Aligner Therapy: Effects on Restored Posterior Teeth.Journal of clinical medicine · 2025Article
- Release of monomers in patient saliva following bonding of orthodontic brackets.European journal of orthodontics · 2025Article
- Microbial Consortium-Mediated Degradation of Polyethylene Terephthalate in Orthodontic Aligners: A Comprehensive Review.International journal of microbiology · 2025Review
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
aimThe aim of the present study was to assess the alterations in morphology, roughness, and composition of the surfaces of a conventional and a flowable composite attachment engaged with aligners, and to evaluate the release of resin monomers and their derivatives in an aqueous environment.
methodsZirconia tooth-arch frames (n = 20) and corresponding thermoformed PET-G aligners with bonded attachments comprising two composite materials (universal-C and flowable-F) were fabricated. The morphological features (stereomicroscopy), roughness (optical profilometry), and surface composition (ATR-FTIR) of the attachments were examined before and after immersion in water. To simulate intraoral use, the aligners were removed and re-seated to the frames four times per day for a 7-day immersion period. After testing, the eluents were analyzed by LC-MS/MS targeting the compounds Bis-GMA, UDMA, 2-HEMA, TEGDMA and BPA and by LC-HRMS for suspect screening of the leached dental material compounds and their degradation products.
resultsAfter testing, abrasion-induced defects were found on attachment surfaces such as scratches, marginal cracks, loss of surface texturing, and fractures. The morphological changes and debonding rate were greater in F. Comparisons (before-after testing) revealed a significantly lower Sc roughness parameter in F. The surface composition of the aligners after testing showed minor changes from the control, with insignificant differences in the degree of C = C conversion, except for few cases with strong evidence of hydrolytic degradation. Targeted analysis results revealed a significant difference in the compounds released between Days 1 and 7 in both materials. Insignificant differences were found when C was compared with F in both timeframes. Several degradation products were detected on Day 7, with a strong reduction in the concentration of the targeted compounds.
conclusionsThe use of aligners affects the surface characteristics and degradation rate of composite attachments in an aqueous environment, releasing monomers, and monomer hydrolysates within 1-week simulated use.
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