ArticleProgress in orthodontics2024
The effect of enhanced structure in the posterior segment of clear aligners during anterior retraction: a three-dimensional finite element and experimental model analysis.
Article in Progress in orthodontics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 15 citations in OpenAlex.
- The 'Roller Coaster Effect' in Clear Aligner Premolar Extraction Cases: Posterior Open Bite and Cephalometric Risk Factors.Orthodontics & craniofacial research · 2026Article
- The effect of an indirect anchorage reinforcement device on maxillary anterior intrusion with clear aligners: a three-dimensional finite element analysis and exploratory clinical validation.Progress in orthodontics · 2026Article
- Maxillary anterior retraction with clear aligner: a retrospective comparative cohort study of efficiency between periodontally healthy and stable periodontitis patients.Progress in orthodontics · 2026Article
- Effects of proactive or synchronous anchorage preparation of posterior teeth during anterior en masse retraction with clear aligners: a three-dimensional finite element study.Progress in orthodontics · 2026Article
- Biomechanical Applications of Finite Element Analysis in Orthodontics: A Scoping Review of Force Distribution, Tooth Movement, and Mechanical Performance.Dentistry journal · 2026Review
- A standardized protocol for clear aligner thickness measurement using a 3D-printed auxiliary device.The Angle orthodontist · 2026Article
- Dynamic biomechanical simulation of long-term tooth movement in clear aligners extraction treatment through iterative macro-micro cycles.Clinical oral investigations · 2025Article
- The effectiveness of the attachment position in rotated premolar in clear aligner treatment: a finite element study.BMC oral health · 2025Article
- Effects of different corticotomy approaches on anterior retraction with clear aligners: a finite element study.BMC oral health · 2025Article
- The effect of canine lingual attachments during maxillary arch distalization with clear aligner: a 4D finite element analysis and in vitro simulator study.BMC oral health · 2025Article
- Expert consensus on the clinical strategies for orthodontic treatment with clear aligners.International journal of oral science · 2025Review
- Impact of Molar Distalization with Clear Aligners on Periodontal Ligament Stress and Root Resorption Risk: A Systematic Review of 3D Finite Element Analysis Studies.Dentistry journal · 2025Review
- Comparison of orthodontic clear aligners and fixed appliances for anterior teeth retraction using finite element analysis.Bioinformation · 2024Article
Corrections and comments
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Authors and funding
6 authors at 3 institutions in 1 country.
Funding
Abstract
backgroundMesial tipping of posterior teeth occurs frequently during space closure with clear aligners (CAs). In this study, we proposed a new modification of CA by localized thickening of the aligner to form the enhanced structure and investigate its biomechanical effect during anterior retraction.
methodsTwo methods were employed in this study. First, a finite element (FE) model was constructed, which included alveolar bone, the first premolars extracted maxillary dentition, periodontal ligaments (PDL), attachments and aligners. The second method involved an experimental model-a measuring device using multi-axis transducers and vacuum thermoforming aligners. Two groups were formed: (1) The control group used common CAs and (2) the enhanced structure group used partially thickened CAs.
resultsFE model revealed that the enhanced structure improved the biomechanics during anterior retraction. Specifically, the second premolar, which had a smaller PDL area, experienced a smaller protraction force and moment, making it less likely to tip mesially. In the same vein, the molars could resist movement due to their larger PDL area even though they were applied larger forces. The resultant force of the posterior tooth was closer to the center of resistance, reducing the tipping moment. The canine was applied a larger retraction force and moment, resulting in sufficient retraction of anterior teeth. The experimental model demonstrated a similar trend in force variation as the FE model.
conclusionsEnhanced structure allowed force distribution more in accordance with optimal principles of biomechanics during the extraction space closure while permitting less mesial tipping and anchorage loss of posterior teeth and better retraction of anterior teeth. Thus, enhanced structure alleviated the roller coaster effect associated with extraction cases and offered a new possibility for anchorage reinforcement in clear aligner therapy.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.