[Electrosonographic analysis of sounds emanating from temporomandibular joint without symptom].

OBJECTIVE

To study the characteristic of joint sounds from temporomandibular joint (TMJ) without symptom during mandible movement.

METHODS

Joint sounds of 42 asymptomatic TMJ were recorded and analyzed with K6-I system during mandible movement, the waveform, frequency range, peak frequency and amplitude of joint sounds electrosonogram were studied.

RESULTS

Joint sounds were recorded in 25 joints of the 42 joints, 4 kinds of joint sounds were found according to the waveform, frequency range, peak frequency and amplitude of the electrosonography.

CONCLUSIONS

Joint sounds can be recorded in asymptomatic TMJ during mandible movement, 4 kinds of joints sounds were found according to the electrosonographic characteristics.