Devices prepared from resins are disclosed. In one aspect, a spinal cage is disclosed for implantation between two adjacent vertebrae, the spinal cage formed from a polymer composition comprising a polyetherimide, polyether ether ketone or other biocompatible resin, the spinal cage formed from a process comprising: receiving an input relating to design specifications of the spinal cage； and causing formation of at least a portion of the spinal cage based upon the input and using one or more of an additive and subtractive process.
