Humeral fixation plate guides
An anchor trajectory guide and methods of use thereof are provided. The guide includes a body that has a medial side. The medial side can be placed over a lateral side of a fixation plate. The anchor trajectory guide also includes a locator and a plurality of guide apertures. The locator is disposed on or through the medial side of the body. The locator can be mated with the fixation plate. The guide apertures are disposed through the body at positions corresponding to define anchor locations and orientations to provide good purchase adjacent to or in cortical bone around a medial side of a humerus.
1. A bone anchor trajectory guide, comprising:
a body including a medial side configured to be placed over a lateral side of a fixation plate;
a locator on or through the medial side of the body, the locator configured to mate with the fixation plate; and
a plurality of guide apertures through the body at positions corresponding to defined anchor locations of the fixation plate, wherein
the body includes a first portion that has a constant thickness in the medial-lateral direction between a second portion and a first terminal end of the anchor trajectory guide, and
in the second portion, the body is gradually thinner in the medial-lateral direction between the first portion and a second terminal end of the anchor trajectory guide, which is opposite to the first terminal end.
2. The bone anchor trajectory guide of claim 1 , wherein the defined anchor locations are configured for a left or right side humerus.
3. The bone anchor trajectory guide of claim 1 , wherein the defined anchor locations are configured for a pre-defined size of a humerus.
4. The bone anchor trajectory guide of claim 1 , wherein the defined anchor locations are positioned at patient specific locations based on pre-operative imaging.
5. The bone anchor trajectory guide of claim 1 , wherein the plurality of guide apertures comprises at least one anterior guide aperture with an anterior anchor trajectory and at least one posterior guide aperture with a posterior anchor trajectory, the anterior and posterior anchor trajectories diverging from each other along longitudinal axes thereof in a medial direction.
6. The bone anchor trajectory guide of claim 1 , wherein trajectories of the plurality of guide apertures comprise splayed anchor trajectories.
7. The bone anchor trajectory guide of claim 1 , further comprising a superior array of guide apertures, an inferior array of guide apertures, and central array of guide apertures.
8. The bone anchor trajectory guide of claim 1 , further comprising a pin aperture oriented along a longitudinal axis disposed non-parallel to a longitudinal axis of the locator.
9. The bone anchor trajectory guide of claim 1 , further comprising a pin aperture configured to receive a K-wire, the pin aperture oriented at an acute angle to the lateral side of the guide.
10. The bone anchor trajectory guide of claim 1 , further comprising a plurality of suture slots along a side of the body to allow suture anchoring to the fixation plate.
11. A bone anchor trajectory guide, comprising:
a body including a medial side configured to be placed over a lateral side of a fixation plate;
a locator on or through the medial side of the body, the locator configured to mate with the fixation plate; and
a plurality of guide apertures through the body at positions corresponding to defined anchor locations of the fixation plate, wherein each of the plurality of guide apertures is threaded, wherein
the body includes a first portion that has a constant thickness in the medial-lateral direction between a second portion and a first terminal end of the anchor trajectory guide, and
in the second portion, the body is gradually thinner in the medial-lateral direction between the first portion and a second terminal end of the anchor trajectory guide, which is opposite to the first terminal end.
12. The bone anchor trajectory guide of claim 11 , wherein the defined anchor locations are configured for a left or right side humerus.
13. The bone anchor trajectory guide of claim 11 , wherein the defined anchor locations are configured for a pre-defined size of a humerus.
14. The bone anchor trajectory guide of claim 11 , wherein the defined anchor locations are positioned at patient specific locations based on pre-operative imaging.
15. The bone anchor trajectory guide of claim 11 , wherein the plurality of guide apertures comprises at least one anterior guide aperture with an anterior anchor trajectory and at least one posterior guide aperture with a posterior anchor trajectory, the anterior and posterior anchor trajectories diverging from each other along longitudinal axes thereof in a medial direction.
16. The bone anchor trajectory guide of claim 11 , wherein trajectories of the plurality of guide apertures comprise splayed anchor trajectories.
17. The bone anchor trajectory guide of claim 11 , further comprising a superior array of guide apertures, an inferior array of guide apertures, and central array of guide apertures.
18. The bone anchor trajectory guide of claim 11 , further comprising a pin aperture oriented along a longitudinal axis disposed non-parallel to a longitudinal axis of the locator.
19. The bone anchor trajectory guide of claim 11 , further comprising a pin aperture configured to receive a K-wire, the pin aperture oriented at an acute angle to the lateral side of the guide.
20. The bone anchor trajectory guide of claim 11 , further comprising a plurality of suture slots along a side of the body to allow suture anchoring to the fixation plate.