Abstract
From a clinical viewpoint, it is important to clarify the stomatognathic functions. In order to diagnose stomatognathic dysfunctions, it is necessary to record and examine stomatognathic functional phenomena simultaneously such as mandibular movement, muscular activities, TMJ sounds, and occlusal sounds.A Gnatho-hexagraph is capable of recording simultaneously the various phenomena related to stomatognathic functions in the following manners.1. It can record many phenomena simultaneously such as EMG, TMJ sounds, and occlusal contact sounds related to mandibular movement.2. The mandibular movement is recorded in six-degree-of-freedom with an accuracy of ±150 μm.3. The reference points can be indicated by employing a handy optical pointer.4. By applying a lightweight facebow (weight: 12 g), the patients can demonstrate mandibular movements more physiologically without feeling any stress.5. In this system, the operation is easy and does not require much space.The outline, advantages, and disadvantages of the Gnatho-hexagraph are presented herein, and clinical application of the system to stomatognathic functional examination are discussed using some results obtained from patients.
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