Method and system for assisting implant placement in thin bones such as scapula

1. A method for planning a creation of a cement bore in a bone, comprising:

obtaining a virtual model of a bone, the model of the bone including a proximal bone surface, a distal bone surface, and a depth profile between the proximal bone surface and the distal bone surface;

obtaining a planned positioning of a first implant selected to be implanted in the proximal bone surface;

obtaining an identity of at least one tool used to alter the proximal bone surface to receive the first implant in the planned positioning and obtaining geometry data for the at least one tool;

generating a cement bore required in the bone using the geometry data of the at least one tool and the planned positioning of the first implant; and

outputting the virtual model of the bone with the cement bore indicative of a relation between the cement bore and the distal bone surface.

2. The method according to claim 1 , further comprising repeating the method with a second implant if the cement bore for the first implant pierces through the distal bone surface.

3. The method according to claim 1 , further comprising generating and outputting a jig model having a contour surface being a negative of a corresponding surface of the bone for complementary unique engagement, the jig model for creating the cement bore in the bone.

4. The method according to claim 3 , wherein generating the jig model comprises defining a stop on the jig model to limit a depth of the cement bore to that calculated.

5. The method according to claim 1 , wherein outputting the virtual model of the bone with the cement bore comprises outputting a virtually manipulable three-dimensional model.

6. The method according to claim 1 , wherein obtaining a virtual model of a bone comprises generating a three-dimensional virtual model of the bone using imaging.

7. The method according to claim 1 , wherein obtaining an identity of at least one tool comprises determining the identity of the at least one tool using an identity or geometry data of the first implant.

8. The method according to claim 1 , wherein obtaining a planned positioning of a first implant comprises generating a model of the first implant relative to a virtual model of the bone for navigated selection.

9. The method according to claim 1 , wherein generating the cement bore comprises calculating that the cement bore for the first implant pierces through the distal bone surface, and wherein outputting the virtual model of the bone with the cement bore comprises indicating that the first implant pierces through the distal bone surface.

10. The method according to claim 1 , wherein the method is for planning a creation of a cement bore in a scapula.

11. A system for planning a creation of a cement bore in a bone comprising:

a bone modeler module for obtaining a virtual model of a bone, the model of the bone including a proximal bone surface, a distal bone surface, and a depth profile between the proximal bone surface and the distal bone surface; and

a depth image generator module for obtaining a planned positioning of a first implant selected to be implanted in the proximal bone surface, for obtaining an identity of at least one tool used to alter the proximal bone surface to receive the first implant in the planned positioning and obtaining geometry data for the at least one tool, and for calculating a cement bore required in the bone using the geometry data of the at least one tool and the planned positioning of the first implant, and for an outputting the virtual model of the bone with the cement bore indicative of a relation between the cement bore and the distal bone surface.

12. The system according to claim 11 , further comprising a PSI jig module for outputting a jig model having a contour surface being a negative of a corresponding surface of the bone for complementary unique engagement, the jig model for creating the cement bore in the bone.

13. The system according to claim 12 , wherein the jig model comprises a stop to limit a depth of the cement bore to that calculated.

14. The system according to claim 12 , wherein the jig model is a three-dimension printable model.

15. The system according to claim 11 , wherein the depth image generator module outputs a virtually manipulable three-dimensional model of the bone with the cement bore.

16. The system according to claim 11 , wherein the bone modeler module generates a three-dimensional virtual model of the bone from imaging data.

17. The system according to claim 11 , wherein the depth image generator module determines the identity of the at least one tool using an identity or geometry data of the first implant.

18. The system according to claim 11 , wherein the depth image generator module generates and outputs a model of the first implant relative to virtual model of the bone for navigated selection.

19. The system according to claim 11 , further comprising a depth warning module for calculating that the cement bore for the first implant pierces through the distal bone surface, the system indicating that the first implant pierces through the distal bone surface.

20. The system according to claim 11 , wherein the system is configured to plan the creation of the cement bore in a scapula.