A medical implant has a microscopically rough outer coating that serves tobond the implant to animal tissue. The coating is applied to the implant byphysical vapor deposition. The coating preferable is applied via a generallyoblique coating flux or a low energy coating flux. In some embodiments, thecoating has pores. The pores can contain a drug, which can diffuse over aperiod of time. The coating may be partially nonporous to protect the implantfrom corrosion. The coating can have an outer porous layer that can bond withanimal tissue easily.
