The tooth of this invention lap as for diseased survey instrument 100, expanding the capillary which is included in the inspection object region R which, it illuminates with the illuminating 126 which illuminates the inspection object region R inside the buccal cavity and illuminating 126 it has with the image processing device 142 which possesses the function which appraises the state of the capillary on the basis of the photographing picture which is obtained from camera 110 inside the buccal cavity which possesses the image pickup device 118 which it photographs and image pickup device 118. The tooth of this invention lap according to diseased survey instrument 100, there are no times when pain is given to the patient, at the same time, it becomes possible to obtain the inspection result whose quantitative characteristic and objective characteristic are high.本発明の歯周疾患検査装置100は、口腔内における検査対象部位Rを照明する照明装置126及び照明装置126によって照明した検査対象部位Rに含まれる毛細血管を拡大して撮影する撮像装置118を有する口腔内カメラ110と、撮像装置118から得られる撮影画像に基づいて、毛細血管の状態を評価する機能を有する画像処理装置142とを備える。本発明の歯周疾患検査装置100によれば、患者に苦痛を与えることがなく、かつ、定量性、客観性の高い検査結果を得ることが可能となる。
