ArticleBMC oral health2025
Finite element analysis of the impact of different traction anchorage locations on maxillary molar distalization with clear aligners and implant screws.
Article in BMC oral health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- [Comparative study on the clinical performance of concealable traction hook spherical buccal tubes versus conventional rectangular buccal tubes].Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology · 2026Trial
- Comparative effects of temporary anchorage devices combined with various auxiliary attachments on maxillary molar mesialization with clear aligners: a finite element analysis.BMC oral health · 2026Article
- Three-dimensional finite element analysis of the effects of different distal-end aligner designs on maxillary premolar distalization.Frontiers in bioengineering and biotechnology · 2026Article
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveThis study aims to evaluate the impact of different implant screw insertion sites and traction point combinations of clear aligners on anchorage control during maxillary molar distalization using a three-dimensional finite element analysis.
methodsA finite element model was developed with the second maxillary molar distalized by 2 mm, followed by the distalization of the first maxillary molar by 0.25 mm. The control group, which did not include implant screws, was compared to two experimental groups (A and B), defined by the implant screw insertion sites: between the second premolar and first molar (Group A), and between the first and second molars (Group B). Each traction group was further subdivided (A1, A2, B1, B2) based on the clear aligner traction point location, which was either at the canine or first premolar. Three different force levels (100 g, 150 g, and 200 g) were applied to each group. The primary outcomes assessed were the distalization rate of the maxillary first molar, the three-dimensional displacement of each tooth, and the equivalent stress in the periodontal ligament under various conditions.
resultsAll conditions resulted in distal movement of the first molar and mesial displacement of the remaining teeth.The control group achieved a first molar distalization rate of 58.76%. Among the traction groups, Group B2 demonstrated the highest distalization rate (59.44%) at 200 g. When compared to the other traction groups, B2 exhibited the greatest distalization of the first molar, while minimizing labial displacement of the incisors. However, this configuration also resulted in increased labial displacement of the canine.
conclusionThe results suggest that implant screws placed between the first and second molars, combined with traction points at the first premolar using clear aligners, offer superior molar distalization efficiency and improved control over incisor anchorage during maxillary molar distalization.
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