A system for electrical stimulation in an orthopaedic implant comprising: (i) at least one implantable component that comprises: a spinal cage implant body , a plurality of electrodes conductively isolated from the implant body and exposed at a set of distinct electrode sites on the implant body, the plurality of electrodes including an array of at least three electrodes, wherein a first set of electrodes is conductively isolated from at least a subset of electrodes, and wherein the electrode sites are distributed across the geometry of the implant body , in such a way as to facilitate the generation of osteolytic or osteoinductive regions, implant circuitry that comprises implant receiver circuitry effective to convert an electromagnetic field to an electrical current and implant control circuitry effective to control the plurality of electrodes , wherein the implant control circuitry when in a stimulation operation mode controls the plurality of electrodes with respect to whether electric current is flowing through the electrode, and, when current is flowing through the electrode, with respect to one or more characteristics of the current flowing through the electrode; and (ii) at least one non-implant that comprises: a power source , and transmitter circuitry to generate the electromagnetic field that couples with the implant receiver circuitry . (i) at least one implantable component that comprises: a spinal cage implant body , a plurality of electrodes conductively isolated from the implant body and exposed at a set of distinct electrode sites on the implant body, the plurality of electrodes including an array of at least three electrodes, wherein a first set of electrodes is conductively isolated from at least a subset of electrodes, and wherein the electrode sites are distributed across the geometry of the implant body , in such a way as to facilitate the generation of osteolytic or osteoinductive regions, implant circuitry that comprises implant receiver circuitry effective to convert an electromagnetic field to an electrical current and implant control circuitry effective to control the plurality of electrodes , wherein the implant control circuitry when in a stimulation operation mode controls the plurality of electrodes with respect to whether electric current is flowing through the electrode, and, when current is flowing through the electrode, with respect to one or more characteristics of the current flowing through the electrode; and a spinal cage implant body , a plurality of electrodes conductively isolated from the implant body and exposed at a set of distinct electrode sites on the implant body, the plurality of electrodes including an array of at least three electrodes, wherein a first set of electrodes is conductively isolated from at least a subset of electrodes, and wherein the electrode sites are distributed across the geometry of the implant body , in such a way as to facilitate the generation of osteolytic or osteoinductive regions, implant circuitry that comprises implant receiver circuitry effective to convert an electromagnetic field to an electrical current and implant control circuitry effective to control the plurality of electrodes , wherein the implant control circuitry when in a stimulation operation mode controls the plurality of electrodes with respect to whether electric current is flowing through the electrode, and, when current is flowing through the electrode, with respect to one or more characteristics of the current flowing through the electrode; and (ii) at least one non-implant that comprises: a power source , and transmitter circuitry to generate the electromagnetic field that couples with the implant receiver circuitry . a power source , and transmitter circuitry to generate the electromagnetic field that couples with the implant receiver circuitry . <EOS>