| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a nozzle for a dental handpiece which enables concentrated blowing of an injecting matter such as powder to a specified portion of a tooth while hindering the closure thereof. SOLUTION: Paths and injection ports 21b and 31 separately arranged for a mixture and water are installed rotatably in a pipe 23 for transferring water and a pipe 22 for transferring a mixture and the injection port 21b for the mixture is so formed as to inject the mixture flatly.</p> |
