| 摘要 |
<p>The dental instrument has a head (1) designed as a working part, and a shaft (2) connected with the head, where the instrument experiences a deformation during exceeding of a predetermined temperature. The instrument experiences a change of material property during exceeding of a given temperature. The head is provided with a centric recess (3), into which the shaft is fitted by an adhesive joint. A reservoir chamber is arranged adjacent to the centric recess, and is filled with fluid that expands when the predetermined temperature is reached.</p> |
