Manfredini Daniele, Lombardo Luca, Siciliani Giuseppe
Department of Orthodontics, University of Ferrara, Ferrara, Italy.
, Via Montebello, 31, 44100, Ferrara, Italy.
J Orofac Orthop. 2017 May;78(3):253-258. doi: 10.1007/s00056-016-0079-4. Epub 2017 Jan 13.
The aim of this study was to determine whether there is an association between the presence of asymmetric molar or canine Angle classes on the two sides and the presence of temporomandibular joint dysfunction (TMD).
Participants to the study were divided into two groups: TMD group (90 patients) or a control group (58 patients). In the TMD group, clinical assessment for TMD was performed according to the Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) guidelines by the same two trained examiners. In both groups, all subjects underwent an assessment of dental occlusion, focusing on the assessment of bilateral canine and molar Angle class relationship. The study protocol was reviewed and approved by the Institutional Review Board of the University of Padova, and each participant gave written consent to take part in the investigation.
TMJ pain was diagnosed in 58, disk displacement in 96, arthrosis in 17, and muscle pain in 46 individuals. Molar Angle class was symmetrical in 86 individuals and asymmetrical in 62 subjects. Molar Angle class was not correlated with any of the TMD diagnoses. Canine Angle class was correlated with TMJ arthrosis. Correlation values with the other TMD diagnoses were low and were not significant.
It can be suggested that an association between dental Angle class asymmetry and TMDs does not exist and that the role of dental asymmetries as a factor correlated with the presence of TMD signs and symptoms is minimal.
本研究旨在确定两侧不对称的磨牙或尖牙安氏分类与颞下颌关节紊乱病（TMD）之间是否存在关联。
研究参与者分为两组：TMD组（90例患者）和对照组（58例患者）。在TMD组中，由两名经过相同培训的检查者根据颞下颌关节紊乱病诊断标准（RDC/TMD）指南对TMD进行临床评估。在两组中，所有受试者均接受牙合评估，重点是双侧尖牙和磨牙安氏分类关系的评估。该研究方案经帕多瓦大学机构审查委员会审核并批准，每位参与者均签署书面同意书参与调查。
58例诊断为颞下颌关节疼痛，96例诊断为盘移位，17例诊断为关节病，46例诊断为肌肉疼痛。86例个体的磨牙安氏分类对称，62例不对称。磨牙安氏分类与任何TMD诊断均无相关性。尖牙安氏分类与颞下颌关节关节病相关。与其他TMD诊断的相关值较低且无统计学意义。
可以认为牙安氏分类不对称与TMD之间不存在关联，牙齿不对称作为与TMD体征和症状相关因素的作用极小。
