| 摘要 |
<p>PURPOSE: To provide a connector having favorable resistance to abrasion by providing cylindrical base of which inserted part is connected to nails and a mushroom top jointed to it, applying a circled hollow for elastic tightening ring onto a socket around the waist and applying a support ring between top conical outer face and socket. CONSTITUTION: A socket 71 previously mounting an elastic support ring 22 and a tightening ring 20 inside, connected to a denture structure 28 after having put in a nail 10, is pressed up to top 14 in lengthwise symmetrical axis direction. When the tightening ring 20 is slightly widened, it bites the rear of the maximum diameter area of the mushroom top 14 of inserted part 12. Edge 16 of the top keeps a distance, for example, 1mm from the inner edge of the socket 17. In case that a compressive stress comes from mastication movement, it is possible to have a relative movement as much as 1mm in lengthwise symmetrical axis direction softened by the elastic support ring 22. Supports on lengthwise symmetrical axis direction and right angle are as well accurate and kept from floating.</p> |
