ArticleThe Angle orthodontist2024
Vertical and transverse treatment effects of Invisalign First system compared to Hyrax maxillary expanders with fixed appliances in mixed dentition patients.
Article in The Angle orthodontist, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 2 of them syntheses that pooled it.
What it found
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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, 2 syntheses or guidelines pooled it.
- Effectiveness of clear aligners for maxillary expansion in growing patients: a systematic review and meta-analysis.Progress in orthodontics · 2026Pooled it
- Predictability of clear aligners in achieving planned dental arch expansion during mixed dentition: a systematic review and meta-analysis.The Angle orthodontist · 2026Pooled it
- Comparative Evaluation of Transverse Maxillary Arch Changes in Mixed Dentition with Clear Aligners vs Conventional Maxillary Expanders: A Systematic Review and Meta-analysis.International journal of clinical pediatric dentistry · 2026Article
- Sagittal and Vertical Changes After Aligner Versus Acrylic Splint Expansion in Mixed Dentition: A Prospective Trial.International dental journal · 2026Article
- Effectiveness of cleaning methods for clear aligners stained with pediatric iron and multivitamin syrups.Scientific reports · 2026Article
- Longitudinal Changes in Occlusal Outcomes and Case Complexity with InvisalignDentistry journal · 2026Article
- Linear Geometric Analysis of Maxillary Expansion in Mixed Dentition: Rapid Palatal Expander Versus Invisalign First System.Dentistry journal · 2025Article
- The three-dimensional influence and clinical significance of anterior traction with rapid expansion during dental replacement.Acta odontologica Scandinavica · 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
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesTo compare vertical and transverse changes in mixed dentition patients treated with the Invisalign First System (IFS) to those treated with a banded hyrax expander with fixed appliances (Hyrax) and control groups, and to assess the efficiency rate of dental arch expansion with IFS. MATERIALS AND
methodsThe study included 80 mixed dentition patients, with 40 in each group (IFS and Hyrax) and 40 controls from the American Association of Orthodontists Foundation Craniofacial Growth Legacy Collection. Skeletal and dental vertical dimension changes and arch width changes between pretreatment (T1) and posttreatment (T2) were evaluated.
resultsAge at T1, time interval (T1-T2), sex, and Angle class did not significantly differ among the groups. Mandibular plane angle changes showed a similar reduction for the control and IFS groups, with no changes in the Hyrax group. However, the differences among the three groups did not reach statistical significance (P = .06). The Hyrax group showed significantly greater expansion in maxillary intermolar width compared to the IFS group, 4.4 vs 2.5 mm, respectively. The efficiency of maxillary expansion using IFS ranged from 52.3% to 76.87%.
conclusionsDuring the mixed dentition stage, no significant changes occurred in vertical dimensions among the control, Hyrax, and IFS groups. Although there was a trend suggesting a greater reduction in mandibular plane angle in the IFS group compared to the Hyrax group, this may not be clinically significant given the less than 1° difference. IFS can be a viable option for addressing mild arch width deficiencies, with a predictable increase in intermolar width of approximately 2.5 mm.
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Registered trials
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