Objective The purpose of this retrospective study was to investigate the relationship between oral habits and temporomandibular joint (TMJ) bony change of temporomandibular disorder (TMD) patients. Methods One hundred and six TMD patients diagnosed according to Research Diagnostic Criteria (RDC/TMD) were selected. All the patients had undergone cone beam computed tomography (CBCT) imaging of TMJ, and their oral habits had been investigated. The associations between oral habits and TMJ radiographic findings were analysed. Results Among 106 patients, the incidence of bruxism, clenching, chewing on one side and being fond of hard food were high. Preferring to hard food increased the risk of ill -defined cortical bone change. Hobby of hard food increased the risk of bony changes in the anterolateral and posterolateral part of the condyle, as well as in the articular tubercle. Chewing on one side could increase the risk of bony changes in the anteromedial aspect of articular fossa. Conclusion Oral habits of TMD patients were associated with type and position TMJ bony change.%目的 研究颞下颌关节病患者口腔不良习惯与颞下颌关节髁突骨质改变之间的关系.方法 选取诊断为颞下颌关节紊乱病的患者106例,问卷调查患者的口腔不良习惯,并行双侧颞下颌关节锥形束CT成像,分析患者口腔不良习惯与颞下颌关节髁突骨质影像学改变的相关性.结果 106例患者中,口腔不良习惯以偏侧咀嚼、紧咬牙、夜磨牙和喜食硬物较常见.经统计学分析,喜食硬物是出现髁突骨皮质模糊消失型改变的危险因素(P =0.019,OR=2.570).喜食硬物是髁突前外侧(P =0.025,OR =2.298)、髁突后外侧(P =0.023,OR =2.692)及关节结节(P=0.020,OR =3.067)易出现骨质改变的危险因素.偏侧咀嚼习惯则是关节窝前内侧(P=0.013,OR =0.311)易出现骨质改变的危险因素.结论 口腔的不良习惯与颞下颌关节骨质改变的类型及部位有一定相关性.
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