声电图在可复性颞下颌关节盘前移位诊断中的临床价值

目的研究可复性颞下颌关节（TMJ）盘前移位关节杂音的波形和声电图特点，探讨其临床应用价值。方法利用计算机系统记录，用K6-I软件分析健康人群、可复性关节盘前移位、不可复性关节盘前移位、骨关节病的TMJ杂音声电图特点，并观察利用声电图辅助诊断可复性TMJ盘前移位的灵敏度和特异度。结果在可复性关节盘前移位关节杂音的声电图中反复出现一种波形，在健康TMJ、不可复性关节盘前移位、骨关节病TMJ杂音中未出现或很少出现该波形。利用声电图辅助诊断TMJ盘前移位的灵敏度为77．2％，特异度为93．3％。结论这种波形可能是可复性关节盘前移位关节杂音的特征波形，声电图检查可能是一种临床辅助诊断TMJ盘前移位的新方法。

Clinical application of electrosonography in diagnosis of anterior disc displacement with reduction

Objective To investigate the electrosonography character of sounds emanating from anterior disc displacement with reduction of TMJ and the value of it in clinical diagnosis. Methods The sounds from healthy TMJ, anterior disc displacement with or without reduction of TMJ, and osteoarthritis of TMJ were recorded and analyzed by K6-I system, then the data was used for diagnosis of anterior disc displacement with reduction in clinic. Results A special kind of waveform was found in the electrosonography of sounds from anterior disc displacement with reduction repeatedly, and seldom or not in sounds from healthy joints, anterior disc displacement without reduction or osteoarthritis of TMJ. The diagnostic sensitivity of anterior disc displacement with reduction by using electrosonography analysis was 77.2% and specificity was 93.3% when compared with the clinical diagnosis based on clinical appearance and radiography evidence. Conclusions The special kind of waveform may be characteristic wave of sounds from anterior disc displacement with reduction of TMJ, which is useful for assistant diagnosis of anterior disc displacement with reduction in clinic.