disclosed are medical prosthetic devices or medical implants which exhibit improved biocompatitibly . the devices or implants include a metal material , e . g . titanium , in which the metal surface parts are coated with a corresponding hydride material that contains one or more biomolecule substance . this biomolecule substance may contain one or more biologically active molecules , e . g . bio - adhesives , biopolymers , blood proteins , enzymes , extra cellular matrix proteins , extra cellular matrix biomolecules , growth factors and hormones , peptide hormones , deoxyribonucleic acids , ribonucleic acids , receptors , enzyme inhibitors , drugs , biologically active anions and cations , vitamins , adenosine monophosphate , adenosine diphosphate , adenosine triphosphate , marker biomuolecules , amino acids , fatty acids , nucleotides , or sugars .