Bellerive Audrey, Montpetit Andrée, El-Khatib Hicham, Carra Maria Clotilde, Remise Claude, Desplats Eve, Huynh Nelly
Faculté de Médecine Dentaire, Université de Montréal, CP 6128 succ. Centre-ville, Montreal, QC, H3C 3J7, Canada.
Faculté de Médecine Dentaire, Université de Laval, 2420 rue de la Terrasse, Pavillon Médcine Dentaire, Quebec (Que.), G1V 0A6, Canada.
Sleep Breath. 2015 Dec;19(4):1265-71. doi: 10.1007/s11325-015-1156-4. Epub 2015 Mar 20.
Sleep bruxism (SB) is a movement described as an involuntary mastication movement during sleep, also defined as rhythmic masticatory muscle activity (RMMA). It is observed in 2-40 % of the pediatric population. A link was suggested between respiratory events and RMMA. Rapid palatal expansion (RPE) is an effective orthopedic treatment for correcting maxillary transverse deficiency and sleep-disordered breathing (SDB) in children. The aim was to evaluate the possible reduction of SB after rapid palatal expansion (RPE) therapy.
A total of 32 patients (8-14 years old; 22 girls and 10 boys) received an orthodontic treatment for transverse maxillary deficiency (5 mm or more) at the orthodontics department of the Université de Montréal. They underwent an ambulatory polysomnography (PSG) before, after expansion with the expander, and at the end of the study without the expander. They were classified into three subgroups based on sleep electromyography (EMG) data.
Total sleep time and stage NREM 3 presented significant differences between the types of appliances. Moreover, there was a time effect observed for total sleep time, sleep cycles, stage NREM 2, and stage REM, while only a trend suggested for stage NREM 3. Significant differences were observed between subgroups for both RMMA episodes and burst indexes, similarly, for the oxygen desaturation index (ODI). A total of 50 % of the patients were classified as responders when RMMA episodes index decreased by more than 25 % when comparing treatment efficacy at baseline night.
Most bruxers (65 %) reduced their RMMA episode index after expansion, but sleep and respiratory variables remained unchanged.
睡眠磨牙症（SB）是一种在睡眠期间表现为非自主咀嚼运动的行为，也被定义为节律性咀嚼肌活动（RMMA）。在2% - 40%的儿童人群中可观察到该症状。有研究表明呼吸事件与RMMA之间存在联系。快速腭扩展（RPE）是一种有效的正畸治疗方法，用于纠正儿童上颌横向发育不足和睡眠呼吸障碍（SDB）。本研究旨在评估快速腭扩展（RPE）治疗后睡眠磨牙症（SB）可能的减轻情况。
共有32例患者（年龄8 - 14岁；22名女孩和10名男孩）在蒙特利尔大学正畸科接受了针对上颌横向发育不足（5毫米或以上）的正畸治疗。他们在佩戴扩弓器扩弓前、扩弓后以及研究结束去除扩弓器后分别进行了一次动态多导睡眠图（PSG）监测。根据睡眠肌电图（EMG）数据，将他们分为三个亚组。
不同类型矫治器在总睡眠时间和NREM 3期存在显著差异。此外，在总睡眠时间、睡眠周期、NREM 2期和REM期观察到了时间效应，而NREM 3期仅显示出一种趋势。RMMA发作次数和爆发指数在亚组间存在显著差异，氧去饱和指数（ODI）同样如此。当比较基线夜的治疗效果时，RMMA发作次数指数下降超过25%的患者中，共有50%被归类为有反应者。
大多数磨牙症患者（65%）在扩弓后RMMA发作次数指数降低，但睡眠和呼吸变量保持不变。
