ArticleProgress in orthodontics2024
The effect of maxillary premolar distalization with different designed clear aligners: a 4D finite element study with staging simulation.
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 6 papers, 1 of them a synthesis that pooled it.
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Who cites it
6 citing papers in PubMed, 1 synthesis or guideline pooled it.
- [Advancements in biomechanics and orthodontic strategies for clear aligner therapy].Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology · 2026Pooled it
- Predictability of Sequential Distalization of the Upper Arch Using InvisalignDentistry journal · 2026Article
- Biomechanical effects of varying intrusion-to-retraction ratios on anterior tooth displacement during extraction space closure with clear aligners: an iterative finite element analysis.The Saudi dental journal · 2026Article
- How clinical experience shapes Turkish orthodontists' approaches to clear aligner treatment: a cross-sectional survey.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
- Force distributions associated with different elastic traction methods for maxillary dentition distalization by clear aligners: an in-vitro study.BMC oral health · 2025Article
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Authors and funding
5 authors.
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Abstract
backgroundMolar distalization with clear aligners (CAs) is a common treatment. However, when the molars reach their target position and the distal movement of premolars begins, the mesial movement of molars might reduce the overall efficiency of molar distalization. This study aimed to investigate tooth movement patterns under different CA designs in the premolar distalization stage using a four-dimensional mechanical simulation method.
methodsA finite element method (FEM) model encompassing the maxillary dentition, periodontal ligaments, attachments, and associated CAs was constructed. The simulation aimed to replicate a premolar distalization of 2 mm within 10 sequential steps. Buccal interradicular mini-implants were used. Three groups of CAs were designed: the conventional CA design group (Con group), the second molar half-wrap group (SMHW group) and the all-molar half-wrap group (MHW group). An iterative computational approach was employed to simulate prolonged tooth movement resulting from orthodontic forces. Additionally, morphological alterations in the CA throughout the staging process were simulated utilizing the thermal expansion method.
resultsCompared with the Con and SMHW groups, the MHW group presented significantly reduced mesial movement of the first and second molars. However, the MHW group presented the greatest displacement of canines and incisors. The distalization efficiency of premolars in the MHW group reached 95.5-96.5%, which was substantially greater than that in the Con group (84.5-85%) and the SMHW group (75-75.5%).
conclusionsThe four-dimensional mechanical simulation results indicate that during the process of premolar distalization with CA, removing the distal portion of the aligner covering the first and second molars (MHW group) can effectively reduce the mesial movement of molars. Consequently, this approach can increase the overall efficiency of molar distalization.
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