[Respiratory sleep monitoring and sleep quality questionnaire survey of Class Ⅱ malocclusion adolescents before and after functional orthodontic treatment].

Purpose: To compare the changes of sleep-breathing parameters and sleep quality before and after treatment of Class Ⅱ malocclusion in adolescents.

Methods: Forty-eight adolescent patients were selected for functional orthodontic treatment. Portable sleep breathing monitor and Pittsburgh sleep quality index(PSQI) were used before treatment, 1 month and 10 months after treatment, in order to compare the results of apnea and hypopnea index(AHI), obstructive apnea index(OAI), central apnea index(CAI), number of hypoventilation (HI), oxygen reduction index (ODI), minimum oxygen index(LSpO) and sleep quality index.