There are contradictory results in the relevant literature about the relationship between objective determinants of craniocervical posture and temporomandibular disorder (TMD), whereas no study has worked on ankylosing spondylitis (AS) and TMD relationship. We conducted this study to test the predictors of TMD in AS patients and its relationship with craniocervical posture. AS patients aged between 18 and 50 years consecutively admitted to our outpatient clinics were recruited. TMD was diagnosed by 'Diagnostic Criteria for Temporomandibular Disorders (DC/TMD)'. Spinal mobility was assessed by BASMI; disease activity by ASDAS-CRP and neck disability by Neck Disability Index. Craniocervical posture was assessed on lateral cervical X-ray by measuring the craniocervical angle, cervical curvature angle, suboccipital distance, atlas-axis distance, and anterior translation distance. A total of 98 (58.2% female) patients with a mean age of 37.4 ± 8.2 years were enrolled in this study. TMD was diagnosed in 58 (59.2%) patients. Spinal mobility and craniocervical posture measurements were similar among the two groups. Smoking, bruxism (in females), neck disability and AS disease activity (in males) were higher in TMD patients. Multivariate analysis revealed active smoking (aOR 6.9; 95% CI 1.8-25.6; p = 0.004), bruxism in females (aOR 17.9; 95% CI 2.0-159.2; p = 0.01), high ASDAS in males (aOR 11.8; 95% CI 1.2-122.5; p = 0.038) and neck disability (aOR 12.7; 95% CI 3.8-42.9; p < 0.001) as independent risk factors for TMD in AS patients. No relationship between the craniocervical posture measurements and TMD was found in AS patients. Active smoking, high disease activity in males, bruxism in females and neck disability were found as predictors of TMD in AS patients.

中文翻译：

---

强直性脊柱炎的颞下颌疾病：横断面，单中心研究。

相关文献中有关颅颈姿势与颞下颌疾病（TMD）的客观决定因素之间的关系存在矛盾的结果，而关于强直性脊柱炎（AS）和TMD关系的研究尚未开展。我们进行了这项研究，以检验AS患者中TMD的预测因子及其与颅颈姿势的关系。招募了18至50岁连续进入我们门诊的AS患者。TMD由“颞下颌疾病诊断标准（DC / TMD）”诊断。BASMI评估了脊柱活动度。通过ASDAS-CRP评估疾病活动性，通过颈部残疾指数评估颈部残疾。通过测量颅颈角，颈曲率角，枕下距离，寰枢轴距离和前移距离。这项研究共纳入了98名（平均58.2％的女性）平均年龄为37.4±8.2岁的患者。在58（59.2％）位患者中诊断出TMD。两组的脊柱活动度和颅颈姿势测量结果相似。在TMD患者中，吸烟，磨牙症（女性），颈部残疾和AS疾病活动（男性）较高。多变量分析显示主动吸烟（aOR 6.9; 95％CI 1.8-25.6; p = 0.004），女性磨牙症（aOR 17.9; 95％CI 2.0-159.2; p = 0.01），男性ASDAS高（aOR 11.8; 95％ CI 1.2-122.5； p = 0.038）和颈部残疾（aOR 12.7； 95％CI 3.8-42.9； p <0.001）是AS患者TMD的独立危险因素。在AS患者中，发现颅颈姿势测量值与TMD之间没有关系。积极吸烟