Patient-specific fracture fixation instrumentation and method

Patent metadata

Field	Value
Publication number	US-9675400-B2
Application number	US-201113089595-A
Country	US
Kind code	B2
Filing date	Apr 19, 2011
Priority date	Apr 19, 2011
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

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.

First claim

What is claimed is:

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 and configured to match as an inverse surface to an outer surface of a first bone fragment of a fractured bone of the patient.

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 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 as a inverse surface to an outer surface of a second bone portion of the patient in only one position.

4. The instrument of claim 3 , wherein the second bone portion includes a second bone fragment.

5. The instrument of claim 3 , wherein the first bone fragment and second bone portion are not contiguous.

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

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

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 as a inverse surface 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 of a patient and configured to match as an inverse surface to an outer surface of a first bone fragment of a fractured bone 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 and configured to match as an inverse surface 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. An instrument for internal bone fracture fixation, comprising:
a single elongated arm having a distal end;
a removable coupling connector extending from the distal end; and
a patient-specific bone holder removably coupled to the removable coupling connector at the distal end, the bone holder having a three-dimensional curved and patient-specific bone engagement surface designed during a pre-operative plan based on a medical scan of a patient and configured to match as an inverse surface to an outer surface of a bone fragment of a fractured bone of the patient.

27. The instrument of claim 26 , wherein the removable coupling connection is a snap-fit connection having at least one protrusion detent at the distal end of the elongated arm and an extension extending from the bone holder having a bore to receive the at least one protrusion.

28. The instrument of claim 26 , further comprising an elongated shaft telescopically receiving the elongated arm, wherein the elongated arm can be telescopically adjusted relative to the elongated shaft.

29. The instrument of claim 28 , further comprising a stabilizing member slidably along the elongated shaft through a hole defined in the stabilizing member, the stabilizing member lockable at a desired position on the elongated shaft by a fastener, wherein the stabilizing member is configured for engaging the bone to stabilize the elongated shaft.

Assignees

• Katrana Nicholas J
• Winslow Nathan A
• Mcdaniel John M
• Biomet Mfg Llc

Inventors

• Katrana Nicholas J
• Winslow Nathan A
• Mcdaniel John M

Classifications

• A61F2/30942

  for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques · CPC title

• A61B2017/568

  produced with shape and dimensions specific for an individual patient · CPC title

• A61B2017/00407

  Ratchet means · CPC title

• A61B17/8061

  specially adapted for particular bones (A61B17/70 and A61B17/74 take precedence) · CPC title

• A61B17/282

  Jaws · CPC title