| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent infection by making the functions of a tray better than those of conventional trays, making the tray more easy to use and more inexpensive and using the tray as a throw-away tray. SOLUTION: The inner side 2 of a thin tray body 1 made of plastic is coated with an adhesive 3. A fabric-like film 5 formed with many pieces of yarn on the surface in the form of rings is cut to meet the inner side and the cut film is stuck to 2. When masticated clayey impression material is nested between many pieces of the yarn formed as the rings and is cured, the tray and the impression material are securely bonded.</p> |
