| 摘要 |
<p>A dental handpiece (10) is disclosed, which contains a handpiece body (10', 10'') for giving dental treatment on a site in oral cavity of a patient, and an optical semiconductor device (20) in the handpiece body (10', 10'') for illuminating the site during the treatment. The optical semiconductor device (20) is preferably LED, more preferably VLED. <IMAGE></p> |
