摘要 |
<p>The implant has a flat head with large diameter obtained at receiving ends and provided with an external threaded part (18) on its periphery. The flat head has a female concave part co-operating with additional units such as flared nipple and male concave part, of an false stump (12) comprising another threaded part, such that the two threaded parts are tightened by a thread sliding ring (11).</p> |