A small, threaded, implantable rod with a screw head and drive intended for internal spinal fixation by being screwed into the spine to hold a stabilization device (e.g., rod, plate) to bone; it is made of a material that is chemically degraded and typically absorbed via natural body processes (e.g., degradable polymers). It is available in various types (e.g., pedicle or transfacet, with a slotted, cross, star, or polygonal drive), and is typically used in spinal discectomy and fusion procedures as a means to maintain the relative position of bone allografts or autografts.