Surgical apparatus to support installation of a prosthetic component and method therefore

Patent metadata

Field	Value
Publication number	US-11129605-B2
Application number	US-201715852012-A
Country	US
Kind code	B2
Filing date	Dec 22, 2017
Priority date	Dec 22, 2016
Publication date	Sep 28, 2021
Grant date	Sep 28, 2021

Abstract

A bone cut system comprising a distractor, one or more drill guides, one or more bone cutting jigs, a computer, and a display. The distractor includes electronic circuitry configured to control a measurement process and transmit measurement data. The distractor can include a magnetic distance sensor, a magnetic angle sensor, and load sensors configured to measure a distraction distance, medial-lateral angle, load magnitude applied to the distractor, and position of load in real-time. The distractor equalizes a medial and lateral compartment of a knee joint in flexion or extension at a predetermined loading. Guide holes are drilled to support cuttings with the medial and lateral compartments equalized. The distractor is configured to support one or more bone cuts using cutting jigs coupled to the guide holes that supports installation of a prosthetic component in alignment with a mechanical axis of a leg.

First claim

What is claimed is:

1. A surgical apparatus comprising:
a frame configured to couple to a surface of a first bone;
a support structure configured to couple to a second bone wherein the support structure is configured to fit within an opening of the frame and wherein the support structure is configured to couple to the surface of the first bone when the surgical apparatus is placed at a minimum height;
a distraction mechanism coupled to the support structure wherein the support structure is configured to raise or lower the support structure relative to the frame; and
a medial-lateral (M-L) tilt mechanism coupled between the distraction mechanism and the support structure wherein the M-L tilt mechanism is configured to adjust the M-L angle of the support structure relative to the prepared bone surface.

2. The surgical apparatus of claim 1 further including:
electronic circuitry configured to control a measurement process and to transmit measurement data; and
one or more sensors configured to measure a distraction distance and an M-L angle of the support structure.

3. The surgical apparatus of claim 2 wherein the one or more sensors comprises a magnetic distance sensor configured to measure the distraction distance and a magnetic angle sensor configured to measure the M-L angle of the support structure.

4. The surgical apparatus of claim 1 further including a housing wherein the housing covers a portion of the distraction mechanism and wherein the frame couples to the housing.

5. The surgical apparatus of claim 1 further including a module wherein the module is configured to be placed on the support structure and wherein the module includes a plurality of load sensors configured to measure loading applied to the module.

6. The surgical apparatus of claim 5 further including a plurality of covers wherein a cover of the plurality of covers is configured to couple to the module and wherein each of the plurality of covers has a different anterior-posterior (A-P) slope.

7. The surgical apparatus of claim 1 wherein the distraction mechanism comprises:
a gear drive coupled to the support structure wherein the gear drive is configured to increase or decrease separation between the frame and the support structure wherein the gear drive comprises a post and a gear; and
a housing wherein the housing retains and supports movement of the post, wherein the post has gear teeth operatively coupled to the gear and wherein rotating the gear moves the post and the support structure.

8. The surgical apparatus of claim 7 further including a distraction mechanism lock wherein the lock couples to the gear drive preventing movement of the gear drive and thereby the preventing movement of the post or the support structure.

9. The surgical apparatus of claim 1 wherein the M-L tilt mechanism comprises a worm gear and a gear, wherein the gear of the M-L tilt mechanism couples to a shaft of the support structure, wherein the worm gear can be configured to couple to the gear, and wherein rotating the worm gear is configured to rotate the gear, the shaft and the support structure of the M-L tilt mechanism to a predetermined M-L tilt angle.

10. The surgical apparatus of claim 9 wherein the worm gear is self-locking to maintain the support structure at the predetermined M-L angle.

11. A surgical apparatus comprising:
a frame configured to couple to a surface of a first bone;
a support structure configured to couple to a second bone wherein the support structure is configured to fit within an opening of the frame and wherein the support structure is configured to couple to the surface of the first bone when the surgical apparatus is placed at a minimum height;
a distraction mechanism configured to adjust a distance between the frame and the support structure; and
a medial-lateral (M-L) tilt mechanism configured to tilt the support structure relative to the frame.

12. The surgical apparatus of claim 11 further including electronic circuitry configured to control a measurement process and transmit measurement data wherein a Linear Hall Sensor is configured to measure the height between the frame and the support structure and wherein a Hall Effect sensor is configured to measure the M-L tilt angle of the support structure.

13. The surgical apparatus of claim 11 further including a plurality of frames wherein each frame of the plurality of frames is a different size and removable from the surgical apparatus and further including a plurality of covers configured to couple to a module configured to be placed on the support structure wherein each cover of the plurality of covers has a different anterior-posterior (A-P) slope.

14. The surgical apparatus of claim 11 wherein the distraction mechanism comprises:
a post wherein a region of the post includes gear teeth and wherein the support structure couples to the post wherein the housing retains and supports movement of the post; and
a gear, wherein gear teeth of the gear can be operatively coupled to the gear teeth of the post wherein the gear when operatively coupled can be rotated to raise or lower the post thereby raising or lowering the support structure relative to the frame.

15. The surgical apparatus of claim 14 further including wherein the M-L tilt mechanism couples between the distraction mechanism and the su ort structure.

16. A surgical apparatus comprising:
a frame configured to couple to a prepared bone surface of a first bone;
a support structure configured to couple to a second bone wherein the support structure is configured to fit within an opening of the frame;
a distraction mechanism coupled to the support structure wherein the support structure is configured to raise or lower the support structure relative to the frame;
a medial-lateral (M-L) tilt mechanism coupled between the distraction mechanism and the support structure wherein the M-L tilt mechanism is configured to adjust the M-L angle of the support structure relative to the prepared bone surface;
a module wherein the module is configured to be placed on the support structure and wherein the module includes a plurality of load sensors configured to measure loading applied to the module; and
a plurality of covers wherein a cover of the plurality of covers is configured to couple to the module and wherein each of the plurality of covers has a different anterior-posterior (A-P) slope.

17. The surgical apparatus of claim 16 wherein the distraction mechanism includes:
a post wherein a region of the post includes gear teeth and wherein the support structure couples to the post and wherein the housing retains and supports movement of the post in at least one direction; and
a gear having gear teeth wherein the gear teeth of the gear can be operatively coupled to the gear teeth of the post, wherein the gear drive when operatively coupled is configured to raise or lower the post when rotated thereby raising or lowering the support structure.

18. The surgical apparatus of claim 16 wherein the M-L tilt mechanism comprises a worm gear drive and wherein the worm gear drive is self-locking.

19. The surgical apparatus of claim 16 further including a plurality of frames wherein each frame of the plurality of frames is a different size.

20. The surgical apparatus of claim 17 a distraction mechanism lock wherein the lock couples to the gear of the distraction mechanism thereby preventing rotation.

Assignees

• Orthosensor Inc

Inventors

• Trabish Masei
• Roche Martin
• Delevic Ivan
• Goodchild Gordon
• Jai Lee Byung

Classifications

• A61B17/025 Primary

  Joint distractors · CPC title

• A61B5/4504

  Bones (A61B5/4547 takes precedence) · CPC title

• A61F2/3886

  for stabilising knees against anterior or lateral dislocations · CPC title

• A61F2/38

  for elbows or knees · CPC title

• A61B90/06

  Measuring instruments not otherwise provided for · CPC title