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The effects of nasal respiratory disturbance on sleep status, masticatory muscle function and mandibular posture

鼻呼吸障碍对睡眠状态、咀嚼肌功能和下颌姿势的影响

基本信息

批准号：
10557198
负责人：
MIYAMOTO Keisuke
金额：
$ 0.58万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

Nasal respiratory disturbance is thought to be related to the craniofacial morphogenesis. The aim of this study was to investigate the effects of nasal respiratory disturbance on sleep status, masticatory muscle function and mandibular posture.The vertical mandibular position was recorded intraorally using a magnet sensor at the same time as a standard sleep study in seven patients with obstuctive sleep apnea syndrome (OSAS), who had mild-to-moderate nasal obstruction. The percentage of total sleep time spent with mandibular opening greater than 5 mm was significantly larger (p < 0.001) in patients with OSAS (69.3 【minus-plus】 23.3%) compared with healthy adults without OSAS (11.1 【minus-plus】 11.6%). The stage of sleep effected the vertical mandibular posture during sleep in the supine position. On the other hand, it was found that sleep bruxism is rarely directly associated with apneas, but is rather related to the fragmented sleep.Activities of the masseter, temporal and digastric muscles were recorded for three hours during daytime with 30 children and 30 adults. Children exhibited longer duration of temporal muscle activity, whereas the masseter muscle presented longer duration of activity in adults. The activities of masseter and digastric muscles were significantly related with the vertical facial type in both children and adults.To investigate the bilateral balance of masticatory muscle activity under usual living condition, EMG recordings were performed for 15 normal controls and 15 patients with transverse craniofacial deformity during usual daily life. Asymmetry indices were significantly greater in patients during usual daytime and sleep for the anterior temporal muscle and significantly smaller during sleep for the masseter muscle as compared to the controls.Therefore, it was concluded that nasal respiratory disturbance may cause excessive mouth opening, induce frequent fragmentation of sleep and influence masticatory muscle activity during sleep.

鼻呼吸障碍被认为与颅面形态发生有关。为探讨鼻呼吸紊乱对睡眠状态、咀嚼肌功能和下颌姿势的影响，对7例伴有轻中度鼻塞的阻塞性睡眠呼吸暂停综合征（OSAS）患者，在进行标准睡眠检查的同时，采用磁传感器经口记录下颌垂直位置。OSAS患者下颌骨开口大于5 mm时的总睡眠时间百分比（69.3 [-+] 23.3%）显著高于无OSAS的健康成人（11.1 [-+] 11.6%）（p < 0.001）。睡眠阶段影响仰卧位睡眠时下颌垂直姿势。另一方面，睡眠磨牙症很少与呼吸暂停直接相关，而是与碎片睡眠有关。活动的咬肌，颞肌和二腹肌在白天记录了30名儿童和30名成人三个小时。儿童颞肌活动持续时间较长，而成人咬肌活动持续时间较长。为探讨正常儿童和成人垂直面型与咬肌和二腹肌活动的关系，对15例正常对照者和15例横向颅面畸形患者进行了日常生活中咀嚼肌活动的肌电图记录。不对称指数显着更大的患者在平时白天和睡眠的前颞肌和显着较小的睡眠期间的咬肌相比controls.Therefore，得出结论，鼻呼吸紊乱可能会导致过度张口，诱发频繁的睡眠片段和影响咀嚼肌活动在睡眠期间。