Two-part implant with a hydroxylated soft tissue contact surface

Abstract

Two-part implant for attachment of artificial teeth comprising a base body having a bone contact surface and a soft tissue contact surface. The soft tissue contact surface is at least partially hydroxylated or silanated which results in an improved soft tissue integration.

What is claimed is: 
     
         1 - 19 . (canceled) 
     
     
         20 . Anchor part of a two-part implant system for attachment of artificial teeth, the anchor part being made of ceramic and comprising a base body having a bone contact surface and a soft tissue contact surface,
 wherein the soft tissue contact surface is at least partially hydroxylated.   
     
     
         21 . Anchor part according to  claim 20 , wherein the soft tissue contact surface is completely hydroxylated. 
     
     
         22 . Anchor part according to  claim 20 , wherein the soft tissue contact surface is roughened. 
     
     
         23 . Anchor part according to  claim 20 , wherein the soft tissue contact surface is smooth. 
     
     
         24 . Anchor part according to  claim 22 , wherein the surface roughness of the soft tissue contact surface increases towards the bone contact surface continuously or stepwise. 
     
     
         25 . Anchor part according to  claim 20 , wherein the soft tissue contact surface is hydrophilic. 
     
     
         26 . Anchor part according to  claim 20 , wherein the soft tissue contact surface has the same macroscopic texture as the bone contact surface. 
     
     
         27 . Anchor part according to  claim 20 , wherein it is made of ceramic comprising a zirconium oxide based material. 
     
     
         28 . Method for producing an anchor part of a two-part implant system in accordance with  claim 20 , wherein the soft tissue contact surface is treated with a chemical etching procedure until a hydroxylated surface has been produced. 
     
     
         29 . Method according to  claim 28 , wherein the soft tissue contact surface is shot-blasted, sandblasted and/or roughened using plasma technology before treating with the chemical etching procedure. 
     
     
         30 . Method according to  claim 28 , wherein the chemical etching procedure is carried out with an inorganic acid or a blend of inorganic acids. 
     
     
         31 . Method according to  claim 30 , wherein said inorganic acid is selected from the group consisting of hydrofluoric acid, hydrochloric acid, sulphuric acid and mixtures thereof. 
     
     
         32 . Method according to  claim 30 , wherein said blend of inorganic acids is hydrochloric acid (conc.), hydrogen peroxide and water in a weight ratio of approximately 1:1:5. 
     
     
         33 . Method according to  claim 30 , wherein said blend of inorganic acids is a mixture of hydrochloric acid (conc.)/sulphuric acid (conc.)/water: 2/1/1. 
     
     
         34 . Method according to  claim 28 , wherein the surface is washed with pure water, which can additionally comprise additives, in an atmosphere that is inert in relation to the surface, and the surface, without subjection to a further treatment, is stored in an atmosphere that is inert in relation to the anchor part surface, and/or constantly in the presence of pure water, which can comprise additional additives. 
     
     
         35 . Gas-tight and liquid-tight covering containing the anchor part according to  claim 20 . 
     
     
         36 . Method according to  claim 34 , wherein the surface is stored in a covering which is impermeable for gases and liquids.