| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic tooth movement measuring method employing a three-dimensional reverse engineering technique, in which a tooth movement measuring device spatially coordinates a three dimensional digital model of a tooth to measure a movement status of teeth before and after orthodontic treatment. SOLUTION: According to the invention, the tooth movement measuring device forms two three dimensional models which change corresponding to the point of time and applies a space coordinate to each model. By applying a technique superimposing each model, the tooth movement can be measured quantitatively and qualitatively. In accordance with the present invention, the tooth movement measuring device is capable of quantitatively and qualitatively measuring the tooth movement by applying space coordinates to the three dimensional digital model by a laser beam scanning without requiring a patient to be exposed to a huge amount of irradiation by such as a computer tomography in measuring the movement of teeth. COPYRIGHT: (C)2008,JPO&INPIT
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