Bone cutting system for alignment relative to a mechanical axis

• US 9,339,212 B2
• Filed: 09/13/2013
• Issued: 05/17/2016
• Est. Priority Date: 03/18/2013
• Status: Active Grant

• Current Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Original Assignee: OrthoSensor, Inc (Stryker Corporation)
• Inventors: Stein, Marc, Roche, Martin
• Primary Examiner(s): WOODALL, NICHOLAS W
• Application Number:
  US14/026,664
• Publication Number:
  US 20140276862A1
• Time in Patent Office: 977 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/154 for preparing bone for knee prosthesis
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 2034/102 Modelling of surgical devices, implants or prosthesis
• CPC Class Codes: A61B 2034/104 Modelling the effect of the tool, e.g. the effect of an implanted prosthesis or for predicting the effect of ablation or burring
• CPC Class Codes: A61B 2034/105 Modelling of the patient, e.g. for ligaments or bones
• 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 5/103 Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes A61B5/08 takes precedence; measuring aids for tailors A41H1/00; measuring instruments specially adapted for dentistry A61C19/04
• CPC Class Codes: A61B 5/1036 Measuring load distribution, e.g. podologic studies
• CPC Class Codes: A61B 5/1072 measuring distances on the body, e.g. measuring length, height or thickness A61B5/1076 takes precedence
• CPC Class Codes: A61B 5/1121 Determining geometric values, e.g. centre of rotation or angular range of movement
• CPC Class Codes: A61B 5/45 For evaluating or diagnosing the musculoskeletal system or teeth A61B5/1036, A61B5/1074, A61B7/006 take precedence
• CPC Class Codes: A61B 5/4528 Joints A61B5/4533, A61B5/4538 take precedence
• CPC Class Codes: A61B 5/4571 Evaluating the hip
• CPC Class Codes: A61B 5/4585 Evaluating the knee
• CPC Class Codes: A61B 5/4851 Prosthesis assessment or monitoring
• CPC Class Codes: A61B 5/4887 Locating particular structures in or on the body
• CPC Class Codes: A61B 5/686 : Permanently implanted devices, e.g. pacemakers, other stimulators, biochips A61B5/6861 takes precedence
• CPC Class Codes: A61B 90/37 : Surgical systems with images on a monitor during operation
• CPC Class Codes: A61F 2/38 : for elbows or knees
• CPC Class Codes: A61F 2/3836 : Special connection between upper and lower leg, e.g. constrained
• CPC Class Codes: A61F 2/461 : of knees
• CPC Class Codes: A61F 2/4657 : Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2/4684 : Trial or dummy prostheses
• CPC Class Codes: A61F 2002/4658 : for measuring dimensions, e.g. length
• CPC Class Codes: A61F 2002/4668 : for measuring angles
• CPC Class Codes: G06F 3/0481 : based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance

Abstract

A bone cutting system is disclosed that supports one or more bone cuts that are aligned relative to a mechanical axis. The system comprises a first bone cutting jig, a second bone cutting jig, a sensored insert, a bone jig adapter shim, and a device having at least two reference surfaces. The sensored insert includes a three-axis accelerometer to measure position, rotation, and tilt and includes a plurality of sensors to measure a parameter of the muscular-skeletal system. The reference surface device can be an operating table having a first reference surface and a second reference surface that is perpendicular to the first reference surface for referencing the three-axis accelerometer. The bone jig adapter shim can include a tab that fits into a slot of the first or second bone cutting jigs. A remote system receives accelerometer data to calculate offset relative to a mechanical axis.

Claims

1. A bone cutting system for muscular-skeletal joint installation comprising:

a bone cutting jig wherein the bone cutting jig is coupled to a bone;

a sensored insert configured to measure load and position of load when installed in a prosthetic joint wherein the sensored insert is a prosthetic component, wherein the sensored insert includes a position measurement system, and wherein measurement data is transmitted from the sensored insert;

a bone jig adapter shim configured to couple to the sensored insert where the bone jig adapter shim is configured to couple the sensing insert to the bone cutting jig; and

a remote system configured to receive the measurement data from the sensored insert wherein the measurement data from the sensored insert is used to align the bone cutting jig.

2. The system of claim 1 where the bone jig adapter shim includes a tab wherein the tab is configured to temporarily retain and align the sensored insert to the bone jig adapter shim.

3. The system of claim 2 where the tab of the bone jig adapter shim couples to a cutting slot of the bone cutting jig.

4. The system of claim 1 wherein the sensored insert is configured to be removed, wherein the sensored insert is configured to be installed in a prosthetic joint, and wherein the sensored insert is configured to measure load and position of load in the prosthetic joint.

5. The system of claim 1 further including an operating table where the sensored insert is configured to be referenced to a first surface of the operating table and where the sensored insert is configured to be referenced to a second surface of the operating table where the second surface is perpendicular to the first surface.

6. The system of claim 1 wherein the position measurement system comprises a three-axis accelerometer and wherein the position measurement system measures position, rotation, and slope.

7. The system of claim 1 wherein the position measurement system comprises a three-axis gyroscope and wherein the position measurement system measures position, rotation, and slope.

8. The system of claim 1 wherein a display coupled to the remote system is configured to display at least one angle measured by the sensored insert that corresponds to a final position of the bone cutting jig, wherein the sensored insert is removed from the bone cutting jig, and wherein the bone is cut to the at least one angle measured by the sensored insert.

9. A bone cutting system for muscular-skeletal joint installation comprising:

a bone cutting jig having a slot wherein the bone cutting jig is configured to couple to a bone;

a sensored insert configured to measure load and position of load when installed in a prosthetic joint wherein the sensored insert is a prosthetic component, wherein the sensored insert includes a position measurement system configured to measure position, rotation, or tilt and wherein measurement data is transmitted from the sensored insert;

a bone jig adapter shim configured to couple to the sensored insert wherein the bone jig adapter shim includes a tab configured to be inserted in the slot of the bone cutting jig; and

a remote system configured to receive the measurement data from the sensored insert wherein the measurement data from the sensored insert is used to align the bone cutting jig.

10. The system of claim 9 further including an operating table where the sensored insert is configured to be referenced to a first surface of the operating table and where the sensored insert is configured to be referenced to a second surface of the operating table where the second surface is perpendicular to the first surface.

11. The system of claim 9 wherein the bone jig adapter shim couples to a bottom major surface of the sensored insert, wherein the tab of the bone jig adapter shim is configured to retain and align the sensored insert to the bone cutting jig, and wherein the sensored insert is configured to be removed from the bone cutting jig.

12. The system of claim 9 wherein the position measurement system comprises a three-axis accelerometer and wherein the position measurement system measures position, rotation, and slope.

13. The system of claim 9 wherein the position measurement system comprises a three-axis gyroscope and wherein the position measurement system measures position, rotation, and slope.

14. The system of claim 9 wherein a display coupled to the remote system is configured to display at least one angle measured by the sensored insert that corresponds to a final position of the bone cutting jig, wherein the sensored insert is removed from the bone cutting jig, and wherein the bone is cut to the at least one angle measured by the sensored insert.

15. The system of claim 9 wherein the bone cutting jig is removed from the bone, wherein a prosthetic joint is installed, and wherein the sensored insert is installed in the prosthetic joint.

16. A bone cutting system comprising:

a bone cutting jig configured to couple to a bone;

a sensored insert configured to measure a parameter of the muscular-skeletal system wherein the sensored insert is a prosthetic component, wherein the sensored insert includes a position measurement system configured to measure position, rotation, or tilt, and wherein measurement data is transmitted from the sensored insert;

a bone jig adapter shim configured to couple to the sensored insert to the first bone cutting jig; and

a remote system configured to receive measurement data from the sensored insert wherein the measurement data from the sensored insert is used to align the bone cutting jig to the bone and prepare one or more bone surfaces, wherein the bone cutting jig is configured to be removed from the bone, wherein a prosthetic joint is configured to be coupled to the bone, and wherein the sensored insert is configured to be installed in the prosthetic joint.

17. The system of claim 16 wherein the bone jig adapter shim couples to a bottom major surface of the sensored insert, wherein a tab of the bone jig adapter shim is configured to retain and align the sensored insert to the bone cutting jig, and wherein the sensored insert is configured to be removed from the bone cutting jig.

18. The system of claim 16 wherein a display coupled to the remote system is configured to display at least one angle measured by the sensored insert that corresponds to a final position of the bone cutting jig, wherein the sensored insert is removed from the bone cutting jig, and wherein the bone is cut to the at least one angle measured by the sensored insert.

19. The system of claim 16 wherein the position measurement system comprises a three-axis accelerometer.

20. The system of claim 16 wherein the position measurement system comprises a three-axis gyroscope.