Frequency of daytime tooth clenching episodes in individuals affected by masticatory muscle pain and pain-free controls during standardized ability tasks
Frequency of daytime tooth clenching episodes in individuals affected by masticatory muscle pain and pain-free controls during standardized ability tasks
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DOI：
10.1007/s00784-016-1870-8
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发表时间：
2017-05-01
影响因子：
3.4
通讯作者：
Michelotti, Ambrosina
中科院分区：
文献类型：
--
作者：
Cioffi, Iacopo;Landino, Donatella;Michelotti, Ambrosina
咬牙被认为与颞下颌疼痛有关。然而，对白天握拳发作的肌电图特征的研究很少。本研究旨在分析有咀嚼肌疼痛和无咀嚼肌疼痛的患者的白天紧握发作的频率、幅度和持续时间。15名患有咀嚼肌肌痛的女性（MP组，平均+/- SD年龄= 26.4 +/- 7.6岁）与18岁的无痛女性（CTR组，平均+/- SD年龄= 25.3 +/- 2.8岁）相匹配，被提交给三个不同的能力任务（填写40分钟问卷，阅读20分钟，玩20分钟视频游戏）。分析右咬肌肌电活动周期（AP）分别大于自主收缩最大值的10% （AP10）、20% （AP20）和30% （AP30）。MP组AP10、AP20和AP30的平均频率高于CTR组（均p < 0.05）。仅在填写问卷时，MP组AP10平均持续时间高于CTR组（p = 0.0033）。与阅读杂志相比，CTR组在玩电子游戏时AP10的频率和持续时间都有所增加。能力任务不影响MP组的肌肉活动。患有咀嚼肌疼痛的人在白天出现高强度和低强度紧握发作的频率都有所增加。能力任务的类型只影响无痛个体的紧握发作频率和持续时间。临床医生应该认识到，在咀嚼肌疼痛的个体中，白天握拳的频率和强度明显增加，以便更好地定制治疗。
Tooth clenching has been suggested to be related to temporomandibular pain. However, the electromyographic characteristics of daytime clenching episodes have been minimally investigated. This study aimed to analyze the frequency, amplitude, and duration of daytime clenching episodes in patients with masticatory muscle pain and pain-free individuals.Fifteen women with masticatory muscles myalgia (MP group, mean +/- SD age = 26.4 +/- 7.6 years) matched for age to 18 pain-free women (CTR group, mean +/- SD age = 25.3 +/- 2.8 years) were submitted to three different ability tasks (filling out questionnaires for 40 min, reading for 20 min, and playing a videogame for 20 min). The electromyographic activity periods (AP) of the right masseter greater than 10 % (AP10), 20 % (AP20), and 30 % (AP30) of the maximum voluntary contraction were analyzed.The mean frequencies of AP10, AP20, and AP30 were greater in MP than in CTR individuals (all p < 0.05). The mean duration of AP10 was higher in MP group than CTR group only while filling out the questionnaires (p = 0.0033). CTR group had an increased frequency and duration of AP10 while playing the videogame than while reading a magazine. The ability tasks did not affect the muscle activity in the MP group.Individuals with masticatory muscle pain have an increased frequency of both high and low-intense daytime clenching episodes. The type of ability task affects the frequency and the duration of clenching episodes only in pain-free individuals.Clinicians should recognize that the frequency and intensity of daytime clenching are noticeably increased in individuals with masticatory muscle pain in order to better tailor treatment.