Supporting element for attachment to bone, comprising means for placement of attachment means and a surface for positioning against said bone, wherein said surface is, at least during use, provided with sponge like biocompatible material, enclosed between said bone and said surface, wherein said sponge like material is provided as granules having an internal porosity and are provided such that at least micro spaces are provided between said granules in which during use bone can grow into and/or from, characterised in that said sponge like material comprises titanium, made by a reaction of titanium tetrachloride.
