ArticleBMC oral health2023
Comparison of invisalign mandibular advancement and twin-block on upper airway and hyoid bone position improvements for skeletal class II children: a retrospective 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 15 papers.
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Who cites it
15 citing papers in PubMed, 21 citations in OpenAlex.
- The effect of mandibular advancement with clear aligners compared with activator therapy on maxillary and mandibular volumes: a randomized controlled trial using CBCT.BMC oral health · 2026Trial
- Long-Term Changes Following Orthopedic Mandibular Advancement Therapy in Pediatric Obstructive Sleep Apnea: a 7-Year Follow-up Study.Clinical oral investigations · 2026Article
- Efficacy of clear functional orthodontic appliances versus traditional functional appliances in the treatment of Class II malocclusion: A systematic review and meta-analysis.Korean journal of orthodontics · 2026Article
- Do treatment outcomes of clear aligners remain stable over time? A systematic review.Journal of orthodontic science · 2026Review
- Comparison of craniofacial skeletal morphology in pediatric obstructive sleep apnea-hypopnea syndrome patients with class II and class III malocclusions: a retrospective cross-sectional study.Frontiers in pediatrics · 2026Article
- Mechanical mechanism study of upper airway collapse and twin block treatment in a patient with mandibular retrognathia using fluid-structure interaction simulation.BMC oral health · 2025Article
- Retrospective Evaluation of InvisalignDentistry journal · 2025Article
- Effectiveness of Clear Aligner Therapy in Orthodontic Management for Children with Mixed Dentition: A Scoping Review.International journal of clinical pediatric dentistry · 2025Review
- Efficacy comparison between dentofacial orthopedic treatment and adenotonsillectomy on children with obstructive sleep apnea and skeletal class II malocclusion: a retrospective study.BMC oral health · 2025Article
- Changes in upper airway morphology and respiratory function of adolescent patients with mandibular retrognathism treated with clear aligner mandibular advancement: a prospective study.BMC oral health · 2025Article
- Review
- Article
- The effect of different functional appliances on the sagittal pharyngeal airway dimension in skeletal class II: a retrospective study.Scientific reports · 2024Article
- Clear Aligners in the Growing Patient: A Systematic Review.Children (Basel, Switzerland) · 2024Review
- Comparison between twin block appliance and mandibular advancement on clear aligners in the improvement of airway dimension: incremental versus maximum bite advancement.Frontiers in oral health · 2024Article
Corrections and comments
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Authors and funding
8 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThis study is to evaluate and compare the improvement of upper airway morphology and hyoid bone position in children with Class II mandibular retrusion treated with Invisalign mandibular advancement (MA) and Twin-Block (TB) appliances, utilizing cone beam computed tomography (CBCT).
methods32 children aged between 8 and 11.5 years old were included in this study, with an average age of 10.2 years old. These children were divided into two groups, MA and TB, with 16 children in each group. Changes in upper airway morphology and hyoid bone position before and after treatment were analyzed using CBCT.
results(1) Changes in upper airway before and after treatment: the oropharynx volume (Or-V), the oropharynx minimum cross-sectional area (Or-mCSA), the hypopharynx volume (Hy-V), and the hypopharynx minimum cross-sectional area (Hy-mCSA) in both the MA and TB groups increased after treatment, and the differences were statistically significant (P < 0.05) compared to pre-treatment status. (2) Changes in hyoid bone position before and after treatment: The distances between H point and third cervical vertebra (H-C3), H point and pogonion (H-RGN), H point and mandibular plane (H-MP), H point and Frankfort horizontal plane (H-FH), H and S point (H-S), and H point and palatal plane (H-PP) in both the MA and TB groups increased after treatment, and the differences were statistically significant (P < 0.05).
conclusionBoth MA and TB appliances effectively improved the structural narrowness of the upper airway and reduced respiratory resistance, thus improving breath quality. However, MA showed more effectiveness in improving the narrowest part of the hypopharynx compared to TB. Both appliances also promoted anterior downward movement of the hyoid bone, which opens the upper airway of the oropharynx and hypopharynx and helps the upper airway morphology return to normal range.
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Registered trials
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