Since condylar movement includes both translatory and rotatory components

each condylar reference point moves in different path. Therefore

the choice of condylar reference point is important for the interpretation of condylar movement traces. Kinematic center was originally suggested by Kohno. It's like a translating rotational center of the condyle disk complex in condylar movements. Its movement traces are mainly determined by the contour of the articular eminence

and independent of additional rotatory component of condylar movements. To date

commercial comdylar traces of kinematic center recording system if not available in market. There are rare explorations in this field. Therefore

the aim of this study was to develop condylar traces of kinematic center recording system. A condylar movement traces of kinematic center recording system has been developed with the combinations of computer graphic

mathematics and oral physiology. The movement traces of any point on the mandible can be reconstructed by this system. Furthmore

the kinematic center of condylar can be located and its traces can be analyzed by this system.