A method of addressing a condition of a living body comprising the steps of using an energy beam to form a set of pores in a work piece biocompatible membrane. The pores should have a mean area of less than 500 .mu.m through the biocompatible membrane, thereby producing a microporous membrane adapted to facilitate tissue in growth. This membrane is placed at least partially about an article that is adapted to be implanted in a living body, which is implanted into the living body, thereby addressing the condition.