User guidance in adjusting bone incision blocks

• US 20060217733A1
• Filed: 02/15/2006
• Published: 09/28/2006
• Est. Priority Date: 02/15/2005
• Status: Active Grant

• Current Assignee: Brainlab AG
• Original Assignee: Brainlab AG
• Inventors: Neubauer, Timo, Plassky, Norman, Gotte, Hubert, Brack, Christian
• Granted Patent: US 7,670,345 B2
• Time in Patent Office: Days
• US Class Current: 606/87
• CPC Class Codes: A61B 17/154 for preparing bone for knee prosthesis
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: A61B 2034/2055 Optical tracking systems
• CPC Class Codes: A61B 2034/2068 using pointers, e.g. pointers having reference marks for determining coordinates of body points
• CPC Class Codes: A61B 2034/207 Divots for calibration
• CPC Class Codes: A61B 2090/3983 Reference marker arrangements for use with image guided surgery
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61B 34/25 User interfaces for surgical systems
• CPC Class Codes: A61B 90/92 coded with colour

Abstract

A bone incision block includes an incision guide, a localization reference adjustably attached to the incision guide, a fastener for fastening to a bone, and an adjustment device. The incision guide defines an incision plane, and the localization reference enables the incision plane to be spatially determined. The adjustment device is operatively coupled between the fastener and the incision guide, wherein the incision plane can be set relative to the bone via the adjustment device, and a spatial position of the adjustment device can be determined via a registration element.

Claims

1. A bone incision block, comprising:

an incision guide that defines an incision plane;

a localization reference adjustably attached to the incision guide, said localization reference enabling the incision plane to be spatially determined;

a fastener for fastening to a bone; and

an adjustment device operatively coupled between the fastener and the incision guide, wherein the incision plane can be set relative to the bone via the adjustment device, and a spatial position of the adjustment device can be determined via a registration element.

2. The bone incision block according to claim 1, wherein the adjustment device comprises setting device, said setting device enabling adjustment in height of the incision guide and adjustment in rotation of the incision guide around two non-parallel axes.

3. The bone incision block according to claim 2, wherein the adjustment device includes one setting medium for each degree of freedom.

4. The bone incision block according to claim 2, wherein the adjustment device has three degrees of freedom, and each setting medium comprises a hand wheel screw setting device.

5. The bone incision block according to claim 2, wherein the setting device are color coded and identified on a display based on the color coding.

6. The bone incision block according to claim 1, wherein the registration element includes an at least puncticular reference arranged fixed to the adjustment device.

7. The bone incision block according to claim 1, wherein the registration element is arranged at a location characteristic of the individual bone incision block.

8. The bone incision block according to claim 1, wherein the registration element is arranged at a preset distance from the localization reference.

9. The bone incision block according to claim 1, wherein the incision guide and the localization reference can be arranged for various configurations at a defined presettable distance from the registration element.

10. The bone incision block according to claim 1, wherein the registration element is a depression at a point on the surface of the adjustment device.

11. The bone incision block according to claim 1, wherein the registration element has a two-dimensional extent.

12. The bone incision block according to claim 11, wherein the registration element is a bore at a point on the adjustment device or is formed by two depressions on the surface of the adjustment device, and the spatial position of the two elements can be ascertained using a navigated pointer.

13. The bone incision block according to claim 1, wherein the registration device includes a detection and display device for the relative angular position between the localization reference and the adjustment device.

14. The bone incision block according to claim 1, wherein the registration device includes a setting device for the relative angular position between the localization reference and the adjustment device that only allows and is lockable in predetermined and defined relative positions, and the set relative position can be indicated or read from the navigation system.

19. The method according to claim 15, further comprising using the bone incision block according to claim 1 to perform the method.

15. A method for user guidance in setting an incision plane defined by an incision guide of a bone incision block using an incision guide adjustment device, comprising:

defining a target incision plane;

spatially determining an actual incision plane with the aid of a medical navigation system and a localization reference adjustably attached to the incision guide;

determining the spatial position of the adjustment device via a registration element; and

outputting adjustment instructions based on the spatial position of the adjustment device, which, starting from the actual incision plane, assist the user in setting the target incision plane.

16. The method according to claim 15, wherein the spatial position of the adjustment device is determined as an angular position relative to the localization reference.

17. The method of claim 16, wherein the angular position relative to the localization reference is determined as a position relative to a defined starting position of the adjustment device.

18. The method according to claim 15, wherein the spatial position of the adjustment device is determined as a position relative to the incision guide.

20. The method according to claim 15, wherein adjustment instructions for individual setting device of the adjustment device are output via a screen output.

21. The method of claim 17, wherein the screen output is part of a navigation system.