PROBLEM TO BE SOLVED: To detect easily, dental caries, plaque adhesion to a tooth, and a health state.SOLUTION: A tooth state detector 100 comprises: a light source part 110 for radiating excitation lights of a plurality of different wavelengths to a tooth D； a detection part 120 for detecting fluorescence intensity included in respective inspection light generated when the excitation lights of the plurality of different wavelengths are radiated to the tooth D； and a control part 130 for determining three states of the tooth D, the states are namely a plaque adhesion, dental caries and a health state, based on the fluorescence intensity of the inspection light detected by the detection part 120 corresponding to the excitation lights of the plurality of wavelengths.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】歯牙の歯垢付着、う蝕および健常の状態を簡単に検出できること。【解決手段】歯牙状態検出装置１００は、互いに異なる複数の波長の励起光をそれぞれ歯牙Ｄに照射する光源部１１０と、複数の波長の励起光を歯牙Ｄに照射したときに発生するそれぞれの検査光に含まれる蛍光強度を検出する検出部１２０と、複数の波長の励起光に対応して検出部１２０でそれぞれ検出された検査光の蛍光強度に基づいて、歯牙Ｄの歯垢付着、う蝕、健常の３つの状態を判定する制御部１３０と、を備える。【選択図】図１
