| abstract |
A medical instrument such as a handpiece provided with a tool for dental treatment or the like is provided with light irradiation means capable of characteristically extracting the deformed portion of the tooth, thereby making it easier to treat the deformed portion.n n n In the vicinity of the handpiece head portion to which the treatment tool can be mounted, a light source capable of characteristically extracting the side portion is provided. Light emitted from the light source irradiates the front of the treatment instrument. Alternatively, the light source includes a plurality of light emitting elements, and is disposed to surround the treatment instrument at the periphery of the distal end of the handpiece head, and irradiates the front of the treatment instrument. When the light is irradiated in the oral cavity, the treatment worker can observe using the filter function for the fluorescence reflection light, and can identify the side portion while treating. |