Abstract
We use a device for oral surgery （tongue, gingiva, cheek, oral floor）, transoral pharyngo-laryngo surgery, endoscopic sinus surgery, and transcanal endoscopic ear surgery. The device has a very thin hand piece, enabling the treatment of narrow spaces （nasal cavity, ear canal）. In endoscopic surgery, we use a filter that cuts the light produced by the laser, so we can see the display without bright light. We consider that our laser device is very useful not for general surgery but also for endoscopic surgery. Histologically, the edge of mucosa that was cut by our laser device is sharp. Therefore, the histological sample is not greatly damaged by heat, which is useful for pathological examination.
