ArticleProgress in orthodontics2023
Effects of aligner activation and power arm length and material on canine displacement and periodontal ligament stress: a finite element analysis.
Article in Progress in orthodontics, 2023. 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, 16 citations in OpenAlex.
- Predictability of maxillary canine retraction comparing power arm and non-power arm using 24 sets of In-house clear aligner in premolar extraction case: a randomized controlled trial.BMC oral health · 2025Trial
- Accuracy of Preliminary Maxillary Canine and Anchorage Tooth Movement in Premolar Extraction Cases Using 12 In-House Clear Aligners: A Randomised Control Trial Comparing Power Arm and Control.Orthodontics & craniofacial research · 2025Trial
- Effect of power arm length and attachment configuration on maxillary molar mesialization with clear aligners: a finite element analysis.BMC oral health · 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
- Biomechanical effects of various occlusal conditions and orthodontic force levels on mandibular canine distalization: a finite element analysis.Scientific reports · 2026Article
- Distal Upper Molar Force Distribution With Clear Aligners Using Different Anterior Teeth Anchorage Setups: A Finite Element Study.Orthodontics & craniofacial research · 2026Article
- Embrasure aligner fit and thickness in 3D-printed and thermoformed aligners: a microcomputed tomography study.Progress in orthodontics · 2025Article
- Dynamic biomechanical simulation of long-term tooth movement in clear aligners extraction treatment through iterative macro-micro cycles.Clinical oral investigations · 2025Article
- Effects of clear aligner edentulous space design on distal canine movement: An iterative finite element analysis in cases involving extraction.Korean journal of orthodontics · 2025Article
- A Retrospective Study Regarding the Efficacy of NuvolaDiagnostics (Basel, Switzerland) · 2025Article
- 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
- Impacts of surface wear of attachments on maxillary canine distalization with clear aligners: a three-dimensional finite element study.Frontiers in bioengineering and biotechnology · 2025Article
- Seeking orderness out of the orderless movements: an up-to-date review of the biomechanics in clear aligners.Progress in orthodontics · 2024Review
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThis study aimed to assess the impact of aligner activation and power arm length and material on canine and aligner displacement, von Mises stress in the power arm, and principal stress in the periodontal ligament (PDL) during canine tooth distalization using finite element analysis (FEA). The effects of aligner activation and power arm length were primary outcomes, while the effect of the power arm material was a secondary outcome.
methodsAligner activation (0.1 mm or 0.2 mm) was applied without using a power arm in two models. The effects of aligner activation, power arm length (12, 13, or 14 mm) and power arm material (stainless steel [SS] or fiber-reinforced composite [FRC]) on canine distalization were investigated in 12 models by evaluating displacement and stress via ALTAIR OptiStruct analysis.
resultsGreater canine displacement was observed in all models with 0.2 mm than 0.1 mm of aligner activation. When models with the same aligner activation were compared, reduced mesiodistal tipping, increased palatal tipping, and increased extrusion of the canine cusp were observed with increasing power arm length. Moreover, the von Mises stress increased as the power arm length increased. Increasing the aligner activation and power arm length increased the maximum principal stress in the PDL. Power arms of the same length in both materials showed the same results in terms of canine displacement, clear aligner displacement, and maximum principal stress in the PDL. However, under conditions of equal length and aligner activation, the von Mises stress of the SS power arm was higher than that of the FRC power arm.
conclusionUsing a power arm in canine distalization reduced mesiodistal tipping but increased palatal tipping and extrusion of the canine cusp. Aligner activation and additional force increased tooth movement and principal stress in the canine PDL. FRC power arms exhibited less von Mises stress than SS power arms.
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