Four-dimensional analysis of mandibular movements with optical position measuring and real-time imaging.

Mandibular movement findings have not always been useful in clinical, even though measuring techniques have improved. This is because there is no method to evaluate condylar movement including the position of the temporal bone. In this study, we have attempted to apply 3-dimensional imaging to mandibular movement data, and have developed a 4-demensional analysis system representing mandibular movements. In this system, the mandibular movement can be observed in real-time by using the CT dataset from a volunteer. As a result the relationship between the mandibular movement and the anatomic structures becomes clear.