Patella resection guide with independent adjustment
A patellar resection guide includes a frame, a first jaw, and a second jaw. The frame includes a first end, at which the first jaw is disposed, and a second end opposed to the first end at which the second jaw is disposed. The guide further includes an arm with a planar surface for guiding a cutting tool. The arm is either or both of rotatable and translatable relative to the frame.
1. A patellar resection guide, comprising:
a frame including a first end and a second end opposed to the first end;
a first jaw disposed at the first end of the frame;
a second jaw disposed at the second end of the frame; and
an arm with a planar surface, the arm being movably connected to the frame such that the arm is rotatable relative to the frame about two mutually transverse adjustment axes.
2. The guide of claim 1 , wherein the adjustment axes are a first adjustment axis and a second adjustment axis, and the arm is connected to the frame such that rotation of the arm about the second adjustment axis changes the first adjustment axis.
3. The guide of claim 2 , wherein the first jaw and the second jaw each include teeth extending along a frame plane, and the second adjustment axis extends parallel to the frame plane.
4. The guide of claim 3 , wherein the arm is rotatable about the second adjustment axis to a position at which the first adjustment axis extends parallel to the frame plane.
5. The guide of claim 1 , wherein the arm is connected to the frame by an adjustable linkage.
6. The guide of claim 5 , wherein the linkage comprises a first link translatable relative to the frame along a first link translation axis.
7. The guide of claim 6 , wherein the linkage comprises a second link connected to the first link such that the second link is rotatable relative to the first link about a second link rotation axis.
8. The guide of claim 7 , comprising a screw, a tab retained between two flanges of the screw and connected to the arm, and a cylindrical tube extending along an arm rotation axis and connected to the arm, and wherein the second link includes an internally threaded eye through which a threaded portion of the screw is disposed and a post extending within the tube along the arm rotation axis.
9. The guide of claim 1 , wherein the second jaw is movably connected to the frame such that the second jaw is translatable toward or away from the first end of the frame.
10. The guide of claim 1 , wherein the first jaw includes two translatable mandibles each being independently translatable relative to the frame.
11. The guide of claim 10 , wherein the first jaw further includes a fixed mandible disposed between the two translatable mandibles, the fixed mandible being connected to the frame at a fixed position.
12. The guide of claim 11 , wherein each of the translatable mandibles are translatable to a position relative to the frame at which at least one tooth of the respective translatable mandible extends further from the frame than the teeth of the fixed mandible.
13. A patellar resection guide, comprising:
a frame including a first end and a second end opposed to the first end;
an arm connected to the frame and having a guide surface;
a first jaw disposed at the first end of the frame, the first jaw including two translatable mandibles that are each independently translatable relative to the frame; and
a second jaw disposed at the second end of the frame.
14. The guide of claim 13 , wherein the translatable mandibles are translatable along respective parallel tracks.
15. The guide of claim 14 , wherein the guide surface is a planar surface and the arm is rotatably connected to the frame.
16. The guide of claim 15 , wherein the arm is rotatable relative to the frame about two mutually transverse adjustment axes.
17. The guide of claim 16 , wherein the adjustment axes are a first adjustment axis and a second adjustment axis, and rotation of the arm about the second adjustment axis changes the first adjustment axis.
18. The guide of claim 17 , wherein the first jaw and second jaw each include teeth extending along a frame plane, and the arm is translatable relative to the frame along a third adjustment axis that extends normal to the frame plane.
19. The guide of claim 13 , wherein the second jaw is movably connected to the frame such that the second jaw translates toward or away from the first end of the frame.