| 摘要 |
Most dental implants of titanium or of titanium alloys are cylindrical parts that are inserted in the gum (screwed and/or impacted) and afterwards the tooth or teeth are mounted thereon. There is a polished area called the neck that emerges from the gum. From the gum that generally takes up between 1.5 and 2 mm, a surface treatment that can be of two types is applied: In order to obtain a "rough" surface ( 3 ) upon submerging it in acids and after having been sanded with different substances, or else, providing it with a hydroxyapatite coating ( 4 ). In accordance with the invention, the surface of the implant is a combination of the two techniques described. It is coated with hydroxyapatite leaving free a strip after the polished neck ( 2 ) that will be subsequently treated with a rough finish. Hence, the implant will be given the advantages of both types of conventional surface treatment.
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