Tallents R H, Hatala M, Katzberg R W, Westesson P L
Department of Orthodontics, Eastman Dental Center, Rochester, N.Y.
J Prosthet Dent. 1993 Mar;69(3):298-304. doi: 10.1016/0022-3913(93)90110-a.
Abnormalities within the temporomandibular joints often produce audible sounds. Electronic recording of joint sounds has been used as a method of staging internal derangement. This study had three objectives: first, to determine whether the characterization of temporomandibular sounds can provide a sensitive and accurate measure for the presence or absence of joint abnormalities in asymptomatic volunteers; second, to evaluate the reproducibility of the sounds, when present, with successive recordings; and third, to evaluate the sound characteristics to determine their predictability for the types of internal derangement. Fifty asymptomatic volunteers (100 joints) were evaluated with an electronic device for the presence of joint sounds. Of the patients, 24% (N = 50, five men and seven women) (16% of all joints) had one or two abnormal joints as diagnosed by magnetic resonance imaging. Forty-four percent of all joints had identifiable sounds; 50% of the sounds were produced when the condyle was located at the apex of the articular eminence. Sounds often occurred in the early opening phase of jaw movement in joints diagnosed as normal by magnetic resonance imaging. Finally, the characteristics of these events did not produce adequate separation to stage the internal derangement.
颞下颌关节内的异常情况常产生可听声音。关节声音的电子记录已被用作一种颞下颌关节内紊乱分期的方法。本研究有三个目标：第一，确定颞下颌关节声音的特征是否能为无症状志愿者关节异常的存在与否提供一种敏感且准确的测量方法；第二，评估当声音存在时，连续记录下声音的可重复性；第三，评估声音特征以确定它们对关节内紊乱类型的预测性。使用电子设备对50名无症状志愿者（100个关节）进行关节声音检查。在这些患者中，经磁共振成像诊断，24%（N = 50，5名男性和7名女性）（占所有关节的16%）有一个或两个关节异常。所有关节中44%有可识别的声音；50%的声音是在髁突位于关节结节顶点时产生的。在经磁共振成像诊断为正常的关节中，声音常出现在下颌运动的早期开口阶段。最后，这些事件的特征无法产生足够的区分来对关节内紊乱进行分期。
