The effectiveness of mouth-taping patches depends on the following conditions:
Patent nasal passages: The user has no obstructive conditions in the nasopharynx (e.g., treated adenoid hypertrophy, rhinitis, etc.).
Habitual mouth breathing: There is no physiological nasal obstruction; the behavior stems solely from poor breathing habits.
Early intervention: Targeting the period of skeletal development in children may reduce the risk of facial structural deterioration; however, it is ineffective for existing skeletal deformities.
