| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an orthodontia spreading device which achieves a simple preparatory work prior to the loading and moreover, excellent biological compatibility. SOLUTION: At least two arms 3 positioned as opposed to each other are provided at a spreading unit with a changeable degree of spreading and each of the arms 3 is provided with a means of mounting it on a tooth. A link mechanism 5 is so arranged to allow interposing of the mounting means between each arm 3 and a tooth while having an internal part 50 and an external part 51. A stably receiving seat 55 is demarcated for an end part 31 of the corresponding arm by the internal part 50 while a fixing surface 54 is provided at the external part 51. The fixing surface 54 is given a shape of allowing mounting thereof on the tooth through a fixing means.</p> |
