Trial reportEuropean journal of orthodontics2023
Patient compliance with Twin Block appliance during treatment of Class II malocclusion: a randomized controlled trial on two check-up prescriptions.
Trial report in European journal of orthodontics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 8 papers.
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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.
Treatment Adherence With Twin-Blocks for Correction of Class II Malocclusion - a Randomized Controlled Trial on Two Check-up Prescriptions
Long-term Stability of Treatment With the Twin Block Appliance
Who cites it
8 citing papers in PubMed.
- Association between overjet reduction and wear time of a New-T-activator: a retrospective cohort study.Progress in orthodontics · 2026Article
- Review
- Evaluation of transverse and sagittal maxillary arch dimensions in growing subjects with Class II Division 1 and Division 2 malocclusion: a retrospective cross-sectional study.Frontiers in dental medicine · 2026Article
- Three-dimensional soft tissue comparison in non-growing patients treated for skeletal Class II Division I malocclusion: mandibular advancement surgery vs. Herbst Appliance.Journal of applied oral science : revista FOB · 2025Article
- Functional Class II Treatment Simultaneous With Selective Reduction of Talon Cusps: A Case Report.Clinical case reports · 2024Article
- Effectiveness of Elastodontic Devices for Correcting Sagittal Malocclusions in Mixed Dentition Patients: A Scoping Review.Dentistry journal · 2024Article
- Patient adherence in orthodontics: a scoping review.BDJ open · 2024Article
- Wearable Orofacial Technology and Orthodontics.Dentistry journal · 2023Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundCompliance is crucial for the treatment outcome with removable appliances. Previous studies on treatment with the Twin Block appliance have focused on effectiveness in relation to other treatment methods or wear-time. Studies on different check-up intervals to improve compliance seem to be lacking.
objectivesTo compare the impact of two different check-up prescriptions on patient compliance and treatment outcome during treatment with Twin Block. TRIAL
designTwo-arm parallel group, single-centre, randomized controlled trial. MATERIALS AND
methodsSeventy-three patients, 38 boys, and 35 girls, mean age 11.2 years, were included and block-randomized into two groups treated with a Twin Block appliance. Group 1 was called for check-up visit every sixth week and group 2 every fourth week. Compliance was evaluated with a TheraMon® microsensor, moulded into the appliance, measuring wear-time. Overjet, overbite, and molar relationships were assessed on study casts before and after treatment. The treatment outcomes were analysed on an intention-to-treat basis.
resultsIn group 1, the reduction of overjet was 5.2 mm and the mean wear-time was 6.9 hours. In group 2, the reduction was 4.7 mm and the wear-time was 6.1 hours. Seventy-four per cent of the patients presented an overjet of 4 mm or less. Wear-time did not correlate to age, gender, or severity of malocclusion. HARMS: No harm was observed in any patient. Lateral open bites were registered during treatment but were normalized at the end of the treatment. LIMITATIONS: The trial was a single-centre study and long-term effects were not evaluated.
conclusionsDuring treatment with the Twin Block appliance, a 4-week check-up interval did not improve treatment outcome or increase wear-time, compared to a 6-week check-up interval. The mean wear-time was 6.5 hours per day, even if the recommendation was 12 hours. CLINICAL
trial registrationNCT05155774.
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