ArticleBMC oral health2025
An integrated approach to posterior anchorage preparation and incisor torque compensation in premolar extraction cases using clear aligners.
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 8 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
8 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
- 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
- Biomechanical analysis of implant anchorage versus class II elastics in maxillary anterior retraction with clear aligners: a three-dimensional iterative finite element study.BMC oral health · 2026Article
- Evaluating the impact of attachment designs on canine derotation in clear aligner therapy: a finite element analysis.Progress in orthodontics · 2026Article
- Clear Aligner Extraction Treatment with Caterpillar Motion Staging: Biomechanical Rationale, Clinical Protocol, and Report of Two Cases.Dentistry journal · 2026Article
- Biomechanical analysis of interradicular and infrazygomatic miniscrew anchorage during two-step and en-masse retraction: A finite element study.BMC oral health · 2026Article
- Efficacy of posterior teeth mesialization with invisalign in moderate anchorage cases.BMC oral health · 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
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
Abstract
backgroundIn clear aligner treatment (CAT), closure of the premolar space is achieved by reducing aligner length. Posterior anchorage preparation is effective in preserving molar angulation; however, the resulting distal tipping can contribute to anterior anchorage loss. This study aims to identify an approach that balances anterior torque compensation with posterior anchorage preparation in CAT.
methodsTwo finite element models were developed to simulate en-masse incisor retraction using clear aligners (CAs). Model 1 simulated first premolar extraction cases, while Model 2 simulated second premolar extraction cases. In Step I, only distal tipping was applied to the posterior teeth as an anchorage preparation strategy. In Step II, a positive torque of 0.08 degrees was introduced to the incisors to simulate torque compensation in a single orthodontic step.
resultsIn Model 1, the maxillary lateral incisor and mandibular central incisor tipped further lingually compared to cases without posterior anchorage preparation. The posterior terminal teeth showed a tendency to tip mesially in Step I, which was partially reduced with anterior torque compensation in Step II. In Model 2, all incisors had a stronger tendency to tip lingually in Step I. Molar anchorage control improved with incisor torque compensation of 0.08 degrees. Tipping was more pronounced in the maxillary arches compared to the mandibular arches. Posterior anchorage loss was greater in Model 2, while Model 1 showed more pronounced anchorage loss in anterior teeth.
conclusionsPosterior anchorage preparation alone increases the risk of anterior anchorage loss. Combining this approach with incisor torque compensation helps distribute the anchorage burden more effectively. As an advanced approach, anterior and posterior anchorage management should be strategically coordinated and adapted to the number of orthodontic steps required in premolar extraction cases treated with CAs. CLINICAL TRIAL NUMBER: Not applicable.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.