Orofacial myofunctional therapy for persistent pediatric obstructive sleep apnea after adenotonsillectomy: evidence limits and patient selection

Background: Adenotonsillectomy is a first-line intervention for many children with obstructive sleep apnea (OSA), yet residual or recurrent disease may persist after surgery. Mouth breathing and orofacial myofunctional disorders are frequently discussed as modifiable functional features, but their relationship to objective sleep outcomes remains difficult to interpret.

Objective: This review maps the evidence for active orofacial myofunctional therapy (OMT) as an adjunctive strategy in children with persistent OSA or sleep-disordered breathing after adenotonsillectomy and defines limits for patient selection and outcome assessment.

Methods: A structured critical review and evidence-mapping approach was applied to 30 open, verifiable sources published from 2006 to 2026. The corpus included clinical guidelines, consensus statements, outcome studies after adenotonsillectomy, studies of orofacial motor function, four pediatric interventional studies of OMT, systematic reviews, one study protocol, a trial registry record, and methodological guidance. No meta-analysis was conducted because pediatric interventions, populations, diagnostic thresholds, and follow-up periods were heterogeneous.

Results: The most consistent signal concerns short-term changes in orofacial function, mouth or nasal breathing patterns, selected symptoms, and quality-of-life measures. Certainty is lower for polysomnographic resolution of OSA, particularly changes in the apnea-hypopnea index. Active therapy, home exercise programs, passive myofunctional devices, orthodontic interventions, and general breathing training should not be pooled as a single exposure.

Conclusions: OMT is best positioned as an investigational adjunct for carefully selected children with objectively confirmed persistent OSA, adequate nasal airway assessment, documented orofacial dysfunction, and measurable adherence. It should not replace repeat polysomnography or standard treatment of residual anatomical obstruction.