ArticleBMC oral health2023
Effects of different designs of orthodontic clear aligners on the maxillary central incisors in the tooth extraction cases: a biomechanical study.
Article in BMC oral health, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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Who cites it
18 citing papers in PubMed, 25 citations in OpenAlex.
- Torque expression in directly printed and thermoformed clear aligners: a controlled in vitro biomechanical comparison of power ridge effects.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
- Effects of Attachment Placement on Palatal Root Torque Control of Maxillary Incisors with Clear Aligners: A Finite Element Study.Journal of clinical medicine · 2026Article
- Tooth rotational control with varying attachment configurations in clear aligners under compromised periodontal ligament support: a finite element study.BMC oral health · 2026Article
- The effect of different thickness of power ridge on torque control during anterior retraction using clear aligners in patients with periodontal disease: a finite element analysis.BMC oral health · 2026Article
- Biomechanical effects of attachment position and pressure ridge design on maxillary arch expansion with clear aligners: a finite element analysis.Progress in orthodontics · 2026Article
- Thermoplastics for Clear Aligners: A Review.Polymers · 2025Review
- Effects of torque overcorrection on mandibular incisor intrusion using clear aligners in the first premolar non-extraction and extraction conditions: a finite element analysis study.BMC oral health · 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
- An integrated approach to posterior anchorage preparation and incisor torque compensation in premolar extraction cases using clear aligners.BMC oral health · 2025Article
- Biomechanical analysis of clear aligners for mandibular anterior teeth intrusion and its clinical application in the design of new aligner attachment.Progress in orthodontics · 2025Article
- Biomechanics of clear aligner therapy: Assessing the influence of tooth position and flat trimline height in translational movements.Orthodontics & craniofacial research · 2025Article
- Biomechanically Valid Clear Aligner Therapy for Premolar Extraction Case: A Case Report and Literature Review.Case reports in dentistry · 2025Article
- Biomechanical effects of root/cortical bone relation on tooth movement during premolar-extraction space closure with clear aligners: a finite element study.Frontiers in bioengineering and biotechnology · 2025Article
- Evaluation of different designs of 3D printed clear aligners on mandibular premolar extrusion using force/moment measurement devices and digital image correlation method.Korean journal of orthodontics · 2024Article
- Comparative assessment of orthodontic clear aligner versus fixed appliance for anterior retraction: a finite element study.BMC oral health · 2024Article
- Comparison of orthodontic clear aligners and fixed appliances for anterior teeth retraction using finite element analysis.Bioinformation · 2024Article
- Clinical insights into tooth extraction via torsion method: a biomechanical analysis of the tooth-periodontal ligament complex.Frontiers in bioengineering and biotechnology · 2024Article
Corrections and comments
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Authors and funding
8 authors at 5 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundControlling the 3D movement of central incisors during tooth extraction cases with clear aligners is important but challenging in invisible orthodontic treatment. This study aimed to explore the biomechanical effects of central incisors in tooth extraction cases with clear aligners under different power ridge design schemes and propose appropriate advice for orthodontic clinic.
methodsA series of Finite Element models was constructed to simulate anterior teeth retraction or no retraction with different power ridge designs. These models all consisted of maxillary dentition with extracted first premolars, alveolar bone, periodontal ligaments and clear aligner. And the biomechanical effects were analysed and compared in each model.
resultsFor the model of anterior teeth retraction without power ridge and for the model of anterior teeth no retraction with a single power ridge, the central incisors exhibited crown lingual inclination and relative extrusion. For the model of anterior teeth no retraction with double power ridges, the central incisors tended to have crown labial inclination and relative intrusion. For the model of anterior tooth retraction with double power ridges, the central incisors exhibited a similar trend to the first kind of model, but as the depth of the power ridge increased, there was a gradual decrease in crown retraction value and an increase in crown extrusion value. The simulated results showed that von-Mises stress concentration was observed in the cervical and apical regions of the periodontal ligaments of the central incisors. The clear aligner connection areas of adjacent teeth and power ridge areas also exhibited von-Mises stress concentration and the addition of power ridge caused the clear aligner to spread out on the labial and lingual sides.
conclusionsThe central incisors are prone to losing torque and extruding in tooth extraction cases. Double power ridges have a certain root torque effect when there are no auxiliary designs, but they still cannot rescue tooth inclination during tooth retraction period. For tooth translation, it may be a better clinical procedure to change the one-step aligner design to two-step process: tilting retraction and root control.
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