process with sinterable powder particles of a suitable grit size being coated with a binding system oxide silicate and nitride ceramics carbides or metal alloys are considered for instance as raw powders as binders polyolefin wax mixtures or partially soluble systems can be used for instance in which a part of the binder can be removed in organic solvents polyalcohols or polyvinylalcohols can also be used which have the additional advantage of being water soluble the molding 30 takes place in the next process step the homogenized material is injected into a mold with the mold being tempered preferably liquid tempered the thus injection molded parts already essentially achieve the shape of the desired connecting element 10 the connecting element 10 is then debound in the debinding step 32 this can be carried out in different ways depending on the binding system to this end typical processes are for instance thermal catalytic or so called solvent debinding the very porous connecting elements 10 following implementation of this step are then hardened this so called sintering 34 is a thermal compression process with which the desired properties of the connecting element can be obtained subsequently the connecting element blank can as far as necessary be subjected to barrel finishing process the stainless steel parts are provided in a container lined with rubber together with grinding bodies which mostly consist of ceramics water and a wash solution rotating or vibrating the container produces abraded material on the surface and on the edges of the material parts the barrel finishing produces a very smooth and matt finished surface.