Abstract
It is important to grasp the functional characteristics of open bite, because open bite subjects have anterior guidance problems and many of them show TMJ dysfunction. However the effect of open bite on stomatognathic function has not been clarified.The purposes of this study are to investigate 1) the characteristics of chewing patterns in subjects with open bite and 2) the relationship between each abnormal chewing pattern and stomatognathic dysfunction.Fourteen normal subjects were selected as a control group, and 30 open bite subjects were selected and clinically classified by the location of open bite and the conditions of stomatognathic function as follows:1. anterior open bite without dysfunction2. anterior open bite with dysfunction3. anterior and posterior open bite without dysfunction4. anterior and posterior open bite with dysfunctionChewing movements of each subject were recorded and qualitively analyzed by Sirognathograph Analyzing System II.As a result, characteristic chewing patterns were observed in subjects with open bite, some of which have relationships with the location of open bite and stomatognathic dysfunction.
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