Bone fixation screw with deployable anchors

A screw device for implantation into a bone of a patient comprising:

• a screw body having an outer surface and an inner cavity;
• a plurality of outer screw threads extending around the outer surface of the screw body;
• a first aperture defined in the outer surface of the screw body, the first aperture open to the inner cavity;
• a second aperture defined in the outer surface of the screw body, the second aperture open to the inner cavity;
• a first anchor pin extendable out of the first aperture from the inner cavity, wherein the first anchor pin includes:
• a central recess extending into the first anchor pin from a proximal end of the first anchor pin, and
• a second anchor pin aperture defined through a side of the first anchor pin and open to the central recess;
• and
• a second anchor pin extendable out of the second aperture from the inner cavity, wherein the second anchor pin is extendable though the central recess, through the second anchor pin aperture, and through the second aperture in the screw body when the first anchor pin is extended through the first aperture, such that the second anchor pin is extendable through the second aperture in the screw body via the first anchor pin.

A screw device for implantation into a bone of a patient comprising:

• a screw body having an outer surface and an inner cavity;
• a plurality of outer screw threads extending around the outer surface of the screw body;
• a first aperture defined in the outer surface of the screw body, the first aperture open to the inner cavity;
• a second aperture defined in the outer surface of the screw body, the second aperture open to the inner cavity;
• a first anchor pin insertable through the inner cavity and extendable out of the first aperture;
• and
• a second anchor pin insertable through the inner cavity and extendable through the first anchor pin and out of the second aperture when the first anchor pin is extended through the first aperture.