A method of treating a cavity created by a percutaneous excisional procedure carried out through an incision includes steps of providing a post-procedure cavity implant, the post-procedure cavity implant including: a radiopaque element; a core portion coupled to the radiopaque element, the core portion including a first porous matrix defining a first controlled pore architecture, and a shell portion coupled to the core portion, the shell portion including a second porous matrix defining a second controlled pore architecture that is different from the first controlled pore architecture; implanting the post-procedure cavity implant into the cavity, and closing the incision.