PATIENT-SPECIFIC FRACTURE FIXATION INSTRUMENTATION AND METHOD

• US 20120271366A1
• Filed: 04/19/2011
• Published: 10/25/2012
• Est. Priority Date: 04/19/2011
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Katrana, Nicholas J., Winslow, Nathan A., McDaniel, John M.
• Granted Patent: US 9,675,400 B2
• Time in Patent Office: Days
• US Class Current: 606/86.R
• CPC Class Codes: A61B 17/282 Jaws
• CPC Class Codes: A61B 17/8061 specially adapted for particular bones A61B17/70 and A61B17/74 take precedence
• CPC Class Codes: A61B 17/8866 for gripping or pushing bones, e.g. approximators joint distractors A61B17/025
• CPC Class Codes: A61B 2017/00407 Ratchet means
• CPC Class Codes: A61B 2017/568 produced with shape and dimensions specific for an individual patient

Abstract

An instrument for internal bone fracture fixation includes a shaft having a distal portion and a patient-specific bone holder coupled to the distal portion. The bone holder has a three-dimensional curved and patient-specific bone engagement surface designed during a preoperative plan based on a medical scan of a patient to match and conform to an outer surface of a bone fragment of the patient in only one position.

Claims

1. An instrument for internal bone fracture fixation comprising:

a first elongated shaft having a first distal portion; and

a first patient-specific bone holder coupled to the first distal portion, the first bone holder having a three-dimensional curved and patient-specific bone engagement surface designed during a preoperative plan based on a medical scan of a patient to match and conform to an outer surface of a first bone fragment of the patient in only one position.

2. The instrument of claim 1, wherein the first bone holder is removably couplable to the distal portion of the first shaft.

3. The instrument of claim 1, wherein the first bone holder is fixedly coupled to the distal portion of the shaft.

4. The instrument of claim 1, wherein the first bone fragment includes a plurality of adjacent bone fragments.

5. The instrument of claim 2, further comprising a second bone holder removably couplable to the distal portion of the first shaft, the second bone holder having a three-dimensional curved and patient-specific bone engagement surface designed during a preoperative plan based on a medical scan to match and conform to an outer surface of a second bone portion of the patient in only one position.

6. The instrument of claim 5, wherein the second bone portion includes a second bone fragment.

7. The instrument of claim 5, wherein the first bone fragment and second bone portion are not contiguous.

8. The instrument of claim 1, wherein the distal portion of the first shaft is connected to a first arm telescopically coupled to the first shaft.

9. The instrument of claim 1, wherein the first shaft is pivotably coupled to a second shaft for scissors-like motion.

10. The instrument of claim 9, wherein the second shaft is coupled to a second patient-specific bone holder.

11. The instrument of claim 10, wherein the second patient-specific bone holder is removably coupled to a distal portion of the second shaft.

12. The instrument of claim 1, wherein the first patient-specific bone holder includes a plurality of holes for receiving pins for stabilizing the first bone fragment.

13. The instrument of claim 1, further comprising a patient-specific implant having a bone-engagement surface designed during the preoperative plan based on a medical scan of the patient to match and conform to an outer surface of a bone portion of the patient in only one position.

14. The instrument of claim 13, wherein the outer surface of the bone portion include the outer surface of the first bone fragment.

15. The instrument of claim 13, wherein the outer surface of the bone portion includes a fractured surface.

16. An instrument for internal bone fracture fixation comprising:

a first elongated shaft having a first arm with a first distal portion;

a first patient-specific bone holder coupled to the first distal portion, the first bone holder having a three-dimensional curved and patient-specific bone engagement surface designed during a preoperative plan based on a medical scan to match and conform to an outer surface of a first bone fragment of the patient in only one position;

a second shaft having a second arm with a second distal portion, the second shaft pivotably coupled to the first shaft; and

a second bone holder coupled to the second distal portion.

17. The instrument of claim 16, wherein the second bone holder is patient-specific.

18. The instrument of claim 16, wherein the first bone holder includes a plurality of holes for receiving fixation pins.

19. The instrument of claim 16, wherein the first and second arms are curved.

20. The instrument of claim 19, wherein the first and second arms are designed to have a patient-specific shape and size.

21. The instrument of claim 16, wherein the first bone holder is removably coupled to the first distal portion.

22. The instrument of claim 16, further comprising a locking member between the first and second shafts for locking the first and second shafts in a selected relative position.

23. The instrument of claim 16, further comprising a stabilizer including a stabilizing shaft coupled to a pivot extension between the first and second shafts, the stabilizer having a stabilizing support engageable to a bone portion of the patient.

24. The instrument of claim 16, further comprising a patient-specific implant having a bone-engagement surface designed during the preoperative plan based on a medical scan of the patient to match and conform to an outer surface of a bone portion of the patient in only one position.

25. The instrument of claim 24, wherein the outer surface of the bone portion include the outer surface of the first bone fragment.

26. A method for internal bone fracture fixation comprising:

engaging an inner three-dimensional surface of a bone holder with an outer surface of a bone fragment of a bone of a patient, the inner surface designed preoperatively to match the bone fragment based on a medical scan of the patient;

moving the bone fragment to engage a fractured surface of the bone using a shaft connected to the bone holder;

passing a pin through a hole of the bone holder into the bone;

removing the bone holder;

attaching a patient-specific bone-engagement surface of an implant to an outer surface of a bone portion and the bone fragment; and

fixing the bone fragment to the bone.

27. The method of claim 26, wherein the shaft is a first shaft of a forceps-like instrument that includes a second shaft.

28. The method of claim 27, further comprising engaging an outer surface of a second bone portion with a patient-specific inner surface of a second bone holder coupled to the second shaft.

29. The method of claim 26, further comprising removably coupling the bone holder to the shaft.