| 摘要 |
<p>The device uses the laser effect for vaporizing or melting various materials in a fragile or delicate environment, particularly for the treatment of dental caries, for the cutting and shaping of various materials whether or not they are used in dentistry such as metals, ivory, enamel, bone etc, for the fusion, on a tooth, of a mineral compound based on hydroxyapatite and ceramic, or for the enlargement of dental cavities using an optical fibre conducting the laser energy. The device comprises a specific laser of the Nd YAG type having a combination of the following properties: &cirf& a wavelength of the order of 1.060 mu m; &cirf& a pulsed energy output of between 0 and 400 millijoules; &cirf& pulse widths lying between 0.3 and 1.2 milliseconds; &cirf& a minimum repetition rate of 50 Hz. The device also includes a handpiece arranged to receive a flexible optical fibre (8), one part of which extends outside the head, for the application of the laser radiation and to allow an air/water mixture to be projected on to the site of the operation. <IMAGE></p> |
