Orthopedic anchor system

1 . A bone anchor system comprising:

a first sleeve that includes: (a) a central first sleeve channel that traverses the first sleeve and extends from a proximal end of the first sleeve to a distal end of the first sleeve, and (b) a central first sleeve axis that extends from the proximal end of the first sleeve to the distal end of the first sleeve, and

a first rod that includes: (a) a first central rod channel that traverses the first rod and extends from a proximal end of the first rod to a distal end of the first rod, (b) a first head on the proximal end of the first rod, the first head including a circular cross-section; (c) a first central rod axis that extends from the proximal end of the first rod to the distal end of the first rod, and (d) a first plurality of threads;

a second rod that includes: (a) a second central rod channel that traverses the second rod and extends from a proximal end of the second rod to a distal end of the second rod, (b) a second head on the distal end of the second rod; (c) a second central rod axis that extends from the proximal end of the second rod to the distal end of the second rod, and (d) a second plurality of threads;

wherein first, second, and third planes are each orthogonal to the central first sleeve axis;

wherein (a) the first plane intersects the second rod but not the first sleeve and not the first rod, (b) the second plane intersects the first rod and the first sleeve but not the second rod, and (c) the third plane intersects the first rod but not the first sleeve and not the second rod;

wherein the first plurality of threads is directly coupled to the second plurality of threads;

wherein the first sleeve includes a first distal shoulder and a first proximal shoulder;

wherein the first rod includes a second proximal shoulder and the second rod includes a second distal shoulder;

wherein the first and second distal shoulders directly contact each other and the first and second proximal shoulders directly contact each other;

wherein the first plane intersects the second distal shoulder but not the first distal shoulder and the third plane intersects the second proximal shoulder but not the first proximal shoulder.

2 . The system of claim 1 , wherein the first sleeve is compressed between the first and second rods.

3 . The system of claim 1 , wherein the first sleeve is compressed between the first and second rods based on the first plurality of threads being directly coupled to the second plurality of threads.

4 . The system of claim 1 , wherein the first sleeve is compressed between the second proximal and distal shoulders.

5 . The system of claim 4 , wherein:

a first additional axis is parallel to the central first sleeve axis and intersects the first and second distal shoulders;

a second additional axis is parallel to the central first sleeve axis and intersects the first and second proximal shoulders.

6 . The system of claim 5 , wherein:

the first additional axis does not intersect the first and second proximal shoulders;

the second additional axis does not intersect the first and second distal shoulders.

7 . The system of claim 1 , wherein:

the first sleeve is an additive manufactured conduit;

the first rod is milled.

8 . The system of claim 1 , wherein the central first sleeve channel is unthreaded.

9 . The system of claim 1 comprising:

a second sleeve that includes: (a) a central second sleeve channel that traverses the second sleeve and extends from a proximal end of the second sleeve to a distal end of the second sleeve, and (b) a central second sleeve axis that extends from the proximal end of the second sleeve to the distal end of the second sleeve;

wherein the central first sleeve channel is identically proportioned in length and varying widths to the central second sleeve channel

wherein the second sleeve has a maximum outer width that is wider than a maximum outer width of the first sleeve.

10 . The system of claim 1 , wherein:

an internal wall of the central first sleeve channel includes a first ridge, a second ridge, and a trough between the first and second ridges;

an external wall of the first rod includes third ridge included within the trough.

11 . The system of claim 10 , wherein:

the first ridge is not a portion of a thread and does not curve about the central first sleeve axis;

the second ridge is not a portion of a thread and does not curve about the central first sleeve axis;

the third ridge is not a portion of a thread and does not curve about the central first sleeve axis.

12 . The system of claim 1 comprising a tulip coupled to the first head of the first rod, wherein:

the tulip includes a distal surface and a proximal surface;

the proximal surface provides an opening to a trough, the trough being configured to receive a fusion rod;

the distal surface includes an aperture encircling at least a portion of the first rod;

the aperture has a maximum width that is smaller than a maximum width of the first head.

13 . The system of claim 1 , wherein:

the first sleeve includes first and second apertures in a sidewall of the first sleeve;

the first aperture includes a long axis parallel to the central first sleeve axis;

the first aperture includes a short axis orthogonal to the long axis of the first aperture;

the first aperture includes a length measured along the long axis of the first aperture and a width measured along the short axis of the first aperture;

the length of the first aperture is greater than the width of the first aperture.

14 . The system of claim 1 , wherein:

the first sleeve includes a proximal third portion, a distal third portion, and a middle third portion between the proximal and distal third portions;

the proximal third portion includes a first thread pitch for a majority of the threads of the proximal third portion;

the distal third portion includes a second thread pitch for a majority of the threads of the distal third portion;

the first thread pitch is less than the second thread pitch.

15 . The system of claim 1 , wherein the first sleeve is welded to the first rod.

16 . The system of claim 15 wherein the first sleeve is welded to the second rod.

17 . The system of claim 1 , wherein the first sleeve is permanently and non-slidingly coupled to the first rod and to the second rod.

18 . The system of claim 1 , wherein the second rod includes a third plurality of threads located distal to the second plurality of threads and distal to the first sleeve.

19 . The system of claim 18 , wherein the second plurality of threads is non-contiguous with the third plurality of threads.

20 . The system of claim 18 , wherein:

the first plurality of threads includes at least one fluted portion;

the second plurality of threads is unfluted.

21 . The system of claim 1 , wherein the second rod is a bolt.