Electrical stimulation implants

An electrical stimulation anchor configured to lock to a bone implant so as to secure the bone implant to a bone, the electrical stimulation anchor comprising:

• a head configured to lock to the bone implant, the head defining a first electrode that defines a first electrically conductive outer surface;
• a tip opposite the head along a central anchor axis that extends along a direction;
• a shaft that is elongated along the central anchor axis and connects the head to the tip, the shaft and the tip defining a second electrode that defines a second electrically conductive outer surface, wherein the head is configured to receive a torque that is transferred to the shaft;
• a core assembly including a ferromagnetic core and an electrical coil wound around the ferromagnetic core, wherein the ferromagnetic core extends into the head;
• and
• an electrical insulator defining a non-conductive outer surface disposed between the first electrically conductive outer surface and the second electrically conductive outer surface along the direction so as to separate the first electrode and the second electrode from each other, the non-conductive outer surface disposed closer to the head along the central anchor axis as compared to the tip,
• wherein the electrical insulator is further disposed in a cavity of the head so as to surround the ferromagnetic core in the head,
• wherein the ferromagnetic core defines a core body and a core proximal end that is attached to the head so as to be configured to transfer the torque applied to the head about the central anchor axis, to the shaft,
• wherein the ferromagnetic core further defines a core distal end opposite the core proximal end along the central anchor axis, wherein the core distal end is attached to the tip so as to be configured to transfer torque applied to shaft about the central anchor axis, to the tip, and
• wherein:
• the core proximal end defines a proximal surface;
• the core distal end defines a distal surface that faces the proximal surface;
• and
• the electrical coil is supported by the proximal surface, the distal surface, and the core body.

An electrical stimulation anchor configured to lock to a bone implant so as to secure the bone implant to a bone, the electrical stimulation anchor comprising:

• a head configured to lock to the bone implant, the head defining a first electrode that defines a first electrically conductive outer surface;
• a tip opposite the head along a central anchor axis that extends along a direction;
• a shaft that is elongated along the central anchor axis and connects the head to the tip, the shaft and the tip defining a second electrode that defines a second electrically conductive outer surface, wherein the head is configured to receive a torque that is transferred to the shaft;
• a core assembly including a ferromagnetic core and an electrical coil wound around the ferromagnetic core, wherein the ferromagnetic core extends into the head;
• and
• an electrical insulator defining a non-conductive outer surface disposed between the first electrically conductive outer surface and the second electrically conductive outer surface along the direction so as to separate the first electrode and the second electrode from each other, the non-conductive outer surface disposed closer to the head along the central anchor axis as compared to the tip,
• wherein the electrical insulator is further disposed in a cavity of the head so as to surround the ferromagnetic core in the head, and
• wherein a radially outermost surface of the head defines the first electrically conductive outer surface, wherein radially outermost surfaces of the shaft and tip define the second electrically conductive outer surface, and wherein the non-conductive outer surface is contiguous with the first electrically conductive outer surface and the second electrically conductive outer surface.