A Process for providing a defined surface topography to at least a portion of a ceramic body, the process comprising the subsequent steps ofa) applying a layer of a calcium containing substance comprising at least one calcium compound onto the surface of at least a portion of the ceramic basic bodyb) thermally treating the ceramic basic body with the layer applied thereon at an elevated temperature, whereby a calcium compound or a calcium component based on the calcium compound diffuses into the basic body to form an intermediate body, said intermediate body comprising in its outermost surface region a calcium containing crystalline phase andc) chemically treating the outermost surface region of the intermediate body with an inorganic acid or base to partially remove the calcium containing crystalline phase, thereby obtaining the surface topography.
