Embodiments of the invention provide an implantable device having a bioresorbable outer layer and a bioactive inner core. The outer layer can be porous, allowing material to pass through and bond with bones. After placement, the outer layer will dissolve into the body over time. The bioactivity, bonding ability, and mechanical properties can be manipulated in many ways. The size, shape, and number of the implantable device may vary, depending upon needs and applications. The implantable device can be introduced into the articulating joint with minimal invasion to act as both a cushion and a load-bearing device, alleviating pain associated with degenerative facet joints, eliminating the need for fusion/fixation procedures, and preserving/restoring the natural function of articulating surfaces.