| 摘要 |
To anchor a fixture (7) in a jaw bone (1), the fixture is applied in a hole (6) which is substantially smaller than the diameter of the fixture. The fixture has a front portion (7b) which from the point of view of diameter grows very much narrower and which is arranged with both a cutting function and a threading function. The fixture is provided with a thread, with one, two or more thread turns extending down along the greatly narrowing portion while substantially maintaining their thread profile. One or more porous layers arranged on the thread turns can also be included. In this way the fixture can exploit the clamping effect from the soft parts (3) of the jaw bone and still effectively penetrate through any hard parts (4, 5) possibly present in the jaw bone, without these hard parts being pressed inward upon fixture application. An effective fusion of the fixture (7) in the jaw bone (1) is achieved with the aid of said porous outer layers (20). |
