Effect of temporomandibular joint and airflow volume by changing jaw position of normal subjects and patients with sleep apnea syndrome

本研究旨在探讨阻塞性睡眠呼吸暂停(OSA)患者和正常对照(9名男性和6名女性)和15名男性阻塞性睡眠呼吸暂停(OSA)患者的颌位和体位是否发生了实质性的气流改变。所有受试者在以下7个位置测量最大吸气流量曲线：a.0%的下颌前直位，b.0%的下颌前仰位，c.50%的颌前仰位，d.75%的颌前仰位，e.0%的颌前侧位，f.50%的颌前侧位，g.75%的颌前侧位。在正常受试者中，通过将体位从仰卧位改为侧卧位而增加，而不是通过增加颌骨前移位置来增加。另一方面，OSA患者的颌位越向前，FIF_(25-75)；增加的越多。但这并不是通过改变他们的身体姿势来增加的。两组颌位50%前移与75%前移差异无统计学意义。在正常受试者中，颌位改变比体位改变更有效。然而，对于OSA患者，体位的改变比颌位的改变更有效。提示50%前位的治疗效果与75%前位的疗效相近。

The aim of this study was to evaluate whether substantial airflow changes occur by changing both jaw position and body posture in normal subjects and patients with obstructive sleep apnea (OSA).15 normal controls (9 males and 6 females) and 15 male OSA patients participated in this study. All subjects were measured their maximum forced inspiratory flow (FIF_<25-75>) curve in seven positions as follows; a.0% jaw forward-upright position, b. 0% jaw forward-supine position, c.50% jaw forward-supine position, d.75% jaw forward-supine position, e.0% jaw forward-lateral position, f.50% jaw forward-lateral position, g.75% jaw forward-lateral position.Although FIF_<25-75> was increased by changing the body posture from supine to lateral in normal subjects, it wasn't increased by increasing the jaw forward position of them. On the other hand, the more jaw position forward, the more FIF_<25-75> increased in OSA patients. But it wasn't increased by changing the body posture of them. There were no significant differences between 50% forward and 75% forward jaw position in both groups.In normal subjects, change of jaw position was more effective than that of body posture for FIF_<25-75>. However in OSA patients, change of body posture was more effective than that of jaw position for FIF_<25-75>. It was suggested that the treatment effect in 50% forward position was similar in 75% forward position.