This study is based on the notion that the mandibular rest position is made change by many different stimuli and those changes may reflect the funktional condition of the stomatognathic system.
On the other hand there were some observations that the mandibular oscillation was able to be found in mandibular fluctuation. The purpose of this study was to design the measurement system of mandibular oscillation and examine the electro-mechanical property of that system.
The subjects were 3 males with a normal tooth alignment and normal occlusion and 2males with some clinical dysfunctional symptoms in stomatognathic system. This system, appling a MKG, is able to record a mandibular oscillation and interocclusal distance.
Then the following results were obtained.
1. Mandibular oscillation was able to be measured by this system, appling a MKG.
2. Mandible always oscillated at rest.
3. In normal subjects, some characteristics were observed in mandibular oscillations at rest, and in the amplitude and the rhythm of mandibular oscillation there were some differences between nomal subjects andsubjects with some clinical dysfunctional symptoms.
