Department of Oral Kinesiology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands.
Clin J Pain. 2013 Aug;29(8):712-6. doi: 10.1097/AJP.0b013e318270fa59.
In a study to the possible role of overuse of the jaw muscles in the pathogenesis of jaw muscle pain, we used a protocol involving concentric and eccentric muscle contractions to provoke a state of delayed-onset muscle soreness (DOMS) in the jaw muscles of healthy individuals. We tested whether the accompanying signs and symptoms would yield the temporary diagnosis of myofascial pain according to the research diagnostic criteria for temporomandibular disorders (RDC/TMD) in these individuals.
Forty persons (mean age±SD=27.7±7.5 y) performed six, 5-minute bouts of eccentric and concentric jaw muscle contractions. Before and immediately after the exercise, and 24 hours, 48 hours, and 1 week later, self-reported muscle fatigue and pain, pain-free maximum mouth opening, pressure-pain thresholds, and the number of painful jaw muscle palpation sites were recorded.
Significant signs and symptoms of DOMS in the jaw muscles were found, which all had resolved after 1 week. In 31 (77.5%) of the participants, these signs and symptoms also gave rise to a temporary diagnosis of myofascial pain according to the RDC/TMD.
The results of this study demonstrate that an experimental protocol involving concentric and eccentric muscle contractions can provoke DOMS in the jaw muscles and the temporary diagnosis of myofascial pain according to the RDC/TMD. The results observed strengthen the supposition that the myofascial pain in TMD patients may be a manifestation of DOMS in the jaw muscles.
在一项关于咀嚼肌过度使用在咀嚼肌疼痛发病机制中可能作用的研究中，我们使用了一种涉及向心和离心肌肉收缩的方案，以在健康个体的咀嚼肌中引发迟发性肌肉酸痛（DOMS）状态。我们测试了在这些个体中，伴随的体征和症状是否会根据颞下颌关节紊乱的研究诊断标准（RDC/TMD）给出肌筋膜疼痛的临时诊断。
40 名受试者（平均年龄±标准差=27.7±7.5 岁）进行了 6 次、每次 5 分钟的离心和向心咀嚼肌收缩。在运动前、运动后即刻以及 24 小时、48 小时和 1 周后，记录自我报告的肌肉疲劳和疼痛、无痛最大张口度、压痛阈值和压痛触诊点的数量。
在咀嚼肌中发现了明显的 DOMS 体征和症状，这些症状在 1 周后均已缓解。在 31 名（77.5%）参与者中，这些体征和症状也根据 RDC/TMD 给出了肌筋膜疼痛的临时诊断。
这项研究的结果表明，涉及向心和离心肌肉收缩的实验方案可以在咀嚼肌中引发 DOMS，并根据 RDC/TMD 给出肌筋膜疼痛的临时诊断。观察到的结果强化了这样一种假设，即 TMD 患者的肌筋膜疼痛可能是咀嚼肌 DOMS 的表现。
