ArticleProgress in orthodontics2025
Biomechanical effects of attachment designs in maxillary first molar mesialization with clear aligners: a finite element study.
Article in Progress in orthodontics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Why does digitally predicted tooth movement fail? the biology-digital mismatch in orthodontics: a critical narrative review.The Saudi dental journal · 2026Review
- The 'Roller Coaster Effect' in Clear Aligner Premolar Extraction Cases: Posterior Open Bite and Cephalometric Risk Factors.Orthodontics & craniofacial research · 2026Article
- Effect of power arm length and attachment configuration on maxillary molar mesialization with clear aligners: a finite element analysis.BMC oral health · 2026Article
- Mastering molar mesialization: the role of attachment designs and tipping compensation in clear aligner therapy-a finite element analysis.BMC oral health · 2026Article
- Distalization of the mandibular first molar with clear aligners: a 3D finite element study.Frontiers in bioengineering and biotechnology · 2025Article
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Authors and funding
3 authors.
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Abstract
backgroundClear aligners face biomechanical limitations in complex tooth movements, particularly first molar mesialization, despite attachment use. Finite element analysis (FEA) can elucidate optimal attachment designs for force delivery.
objectivesTo compare displacement patterns and stress distribution during maxillary first molar mesialization using four attachment designs via 3D FEA.
methodsA maxillary model (MRI-derived) was created with periodontal ligament (PDL), alveolar bone, and clear aligner (0.75 mm thickness). Five scenarios were simulated: no attachment (Model-I), vertical rectangular (Model-II), horizontal rectangular (Model-III), optimized double semi-ellipsoidal (Model-IV), and Yin-Yang attachments (Model-V). Mesial displacement (0.5 mm) was applied, and deformation/stress were analyzed using ANSYS Workbench.
resultsModel-IV (optimized attachment) demonstrated the least first molar tipping, evidenced by its lowest total mesial crown displacement (0.319 mm), and provided the best mesiodistal control. Conversely, Model-I (no attachment) exhibited the highest tipping, with a total mesial crown displacement of 0.376 mm. Yin-Yang attachments (Model-V) significantly reduced buccal displacement by 92% compared to Model-I. Horizontal rectangular attachments minimized rotational movement.
conclusionsOptimized double semi-ellipsoidal attachments provide superior first molar mesialization control, while Yin-Yang designs enhance buccal-lingual stability. Attachment geometry critically influences aligner efficacy.
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