| abstract |
The intraosseous implant intended to be fitted in a bone is provided on the surface with a specific roughness, the implant surface having depressions (1) with a depth (c) of about 20 mum to about 60 mum. At the bottom of the depressions (1) there are base faces (2), and between the depressions (1) there are plateau faces (3). Base faces (2) and plateau faces (3) have a horizontal extent (a, b) of about 10 mum to about 20 mum. These depressions (1) are ideally as smooth as possible, i.e. they have no surface roughness below the cellular dimension. Obliquely ascending side faces (4) extend from the base faces (2) to the plateau faces (3), and the angle of inclination (alpha) between the horizontal and the side faces (4) is about 30° maximum. Below the upper neck portion, the implant has a self-tapping thread, and the neck portion of the implant is provided with a porcelain-like coating. The surface energy and surface tension of the implant are kept as low as possible. Materials which can preferably be used for the implants are titanium, titanium-based alloys or porcelain-like substances. The surface structure results in an implant which, while providing sound immediate postoperative primary stability, is also distinguished by an accelerated and increased load-bearing capacity on account of more intensive osseointegration. |