The author has .measured the duration of occlusal sounds during centric occiusal tapping in 30 patients with TMD and 30 normal subjects as controls, and then correlated the duration of occlusal sounds with CMI, amount of centric slide, midline deviation, habitual side of mastication, and presence of occlusal interference.
The results were as follows
1. The durations of occlusal sounds during centric occlusal tapping were 36.26msec in TMD patients and 22.88msec in normal subjects (p<0.01 ).
2. The correlation between duration of occlusal sounds and CMI was significant(P<0.01).
3. The correlations between duration of occlusal sounds with amount of centric slide, midline deviatie, ., habitual side of mastication, and presence of occlusal interference were not significant (P>0.05).
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