The present cross-sectional study was designed to investigate the association between sleep bruxism (SB), tinnitus and temporomandibular disorders (TMD). The sample consisted of 261 women (mean age of 37.0 years). The Research Diagnostic Criteria for Temporomandibular Disorders were used to classify TMD and self-reported tinnitus. SB was diagnosed by clinical criteria proposed by the American Academy of Sleep Medicine. The results showed an association between painful TMD and tinnitus (OR = 7.3; 95%CI = 3.50-15.39; p 0.001). With regard to SB, the association was of lower magnitude (OR = 1.9; 95%CI = 1.16-3.26; p 0.0163). When the sample was stratified by the presence of SB and painful TMD, only SB showed no association with tinnitus. The presence of painful TMD without SB was significantly associated with tinnitus (OR = 6.7; 95%CI = 2.64-17.22; p 0.0001). The concomitant presence of painful TMD and SB was associated with a higher degree of tinnitus severity (OR = 7.0; 95%CI = 3.00-15.89; p 0.0001). It may be concluded that there is an association between SB, painful TMD and self-reported tinnitus; however, no relationship of a causal nature could be established.
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机译：本横断面研究旨在研究睡眠磨牙症（SB），耳鸣和颞下颌疾病（TMD）之间的关联。样本包括261名女性（平均年龄37.0岁）。颞下颌疾病的研究诊断标准被用来对TMD和自我报告的耳鸣进行分类。 SB是由美国睡眠医学学会提出的临床标准诊断的。结果显示，疼痛的TMD与耳鸣之间存在关联（OR = 7.3; 95％CI = 3.50-15.39; p <0.001）。对于SB，关联程度较低（OR = 1.9; 95％CI = 1.16-3.26; p <0.0163）。当样品由于SB和疼痛的TMD的存在而分层时，只有SB与耳鸣无关。没有SB的疼痛性TMD的存在与耳鸣显着相关（OR = 6.7; 95％CI = 2.64-17.22; p <0.0001）。伴有疼痛的TMD和SB伴有较高的耳鸣严重程度（OR = 7.0; 95％CI = 3.00-15.89; p <0.0001）。可以得出结论，SB，痛苦的TMD和自我报告的耳鸣之间存在关联。但是，无法建立因果关系。
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