Development of an integrated analyzing system using six-degree of freedom jaw tracking device and non-cont three-dimensional shape measuring system

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The purpose of this study was to develop an integrated analyzing system chewing movement with six-degree of freedom jaw tracking device (JKN -1, Tokyo Shizaisha) and non-cont three-dimensional shape measuring system (VMS-250R, UNISN Co.).To analyze the occlusal shape in three-dimensional space, cylindrical and quadratic polynomial curve were used as mathematical models.Commercially available clutch of the JKN-1 was improved for subjects with malocclusions. Originally designed clutch (OrthoClutch-2) was developed, and used with orthodontic adhesive (FujiOrthoLC, GC). Chewing movement can be naturally recorded with the new clutch that helps closure of the lips.Original software program was developed by software language (Microsoft Visual Basic 6, Microsoft Co.) for quantitative analysis of jaw movement near the occlusion phase during mastication.In conclusion, by chewing movement automatic analyzing system was developed with the six-degree of freedom jaw tracking device and non-contact three-dimensional shape measuring system for diagnosis in the field of clinical orthodontics.