| 摘要 |
The invention relates to a device for drying a root canal, with a cannula (4) for injecting a flow of gas into the root canal and a handpiece (1) for holding the cannula (4). According to the invention, the handpiece has a safety valve (5) for preventing the gas pressure in the cannula (4) increasing beyond a predetermined threshold value. The invention also relates to a cannula for injecting a flow of gas into a root canal, said cannula having lateral openings (10) for the gas to escape. |
