| 摘要 |
A light irradiating section irradiates a muscle used for occlusion of teeth, with light, and a light detecting section detects scattered light from the muscle. An oxygen saturation acquiring section acquires an oxygen saturation of the muscle, based on the scattered light thus detected. Further, based on correlation data between oxygen saturation and occlusal force stored in a correlation data storing section, an occlusal force calculating section calculates the occlusal force of the subject corresponding to the oxygen saturation acquired.
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