Patient-specific acetabular alignment guides

• US 8,603,180 B2
• Filed: 05/19/2011
• Issued: 12/10/2013
• Est. Priority Date: 02/27/2006
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: White, John R., Perry, Lance D., Smith, Aaron P., Meridew, Jason D., Morrison, Bryan, Slone, W Jason, Witt, Tyler D., Bollinger, Mark A., Metzger, Robert
• Primary Examiner(s): Isabella, David
• Assistant Examiner(s): SCHILLINGER, ANN M
• Application Number:
  US13/111,007
• Publication Number:
  US 20110224674A1
• Time in Patent Office: 936 Days
• Field of Search: 623 2118- 2221
• US Class Current: 623/22.11
• CPC Class Codes: A61B 17/1617 with mobile or detachable parts
• CPC Class Codes: A61B 17/1642 for producing a curved bore
• CPC Class Codes: A61B 17/1666 for the acetabulum
• CPC Class Codes: A61B 17/1746 for the acetabulum
• CPC Class Codes: A61B 2017/922 Devices for impaction, impact element
• CPC Class Codes: A61B 2034/105 Modelling of the patient, e.g. for ligaments or bones
• CPC Class Codes: A61B 2034/108 Computer aided selection or customisation of medical implants or cutting guides
• CPC Class Codes: A61B 2034/252 indicating steps of a surgical procedure
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations
• CPC Class Codes: A61F 2/30942 for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
• CPC Class Codes: A61F 2/3603 implanted without ablation of the whole natural femoral head endoprosthetic cartilage A61F2/30756
• CPC Class Codes: A61F 2/4609 of acetabular cups
• CPC Class Codes: A61F 2002/30617 Visible markings for adjusting, locating or measuring
• CPC Class Codes: A61F 2002/4633 for selection of endoprosthetic joints or for pre-operative planning
• CPC Class Codes: A61F 2002/4662 for measuring penetration depth
• CPC Class Codes: A61F 2002/4668 for measuring angles
• CPC Class Codes: A61F 2002/4687 Mechanical guides for implantation instruments
• CPC Class Codes: A61F 2250/0097 Visible markings, e.g. indicia
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing

Abstract

An acetabular device includes a patient-specific acetabular alignment guide including a bone engagement surface. The bone engagement surface has a first portion configured and shaped to be conforming and complementary to an acetabular rim surface and a second portion configured and shaped to be conforming and complementary to a periacetabular area of an acetabulum of a patient. The acetabular alignment guide includes a plurality of guiding formations extending through the second portion for guiding a plurality of alignment pins therethrough. The bone engagement surface and the plurality of guiding formations are prepared from a three-dimensional model of the acetabulum of the specific patient reconstructed pre-operatively from a scan of the patient.

Claims

1. An acetabular system comprising:

a patient-specific acetabular alignment guide including a bone engagement surface having first and second portions, the first portion configured and shaped to be conforming and complementary only to a portion of a rim surface around an acetabulum of a specific patient without extending into the acetabulum, and the second portion configured and shaped to be conforming and complementary to a periacetabular area outside the acetabulum of the specific patient in accordance with a three-dimensional model of the acetabulum of the specific patient reconstructed pre-operatively from an image scan of the patient, the acetabular alignment guide including a plurality of guiding formations extending through the second portion for guiding a plurality of alignment pins therethrough, wherein the plurality of guiding formations are arranged and configured based on a pre-operative plan for the patient.

2. The acetabular system of claim 1, further comprising a patient-specific alignment adapter couplable to an acetabular instrument, the alignment adapter including a plurality of apertures configured to correspond to the guiding formations of the acetabular alignment guide for sliding over the corresponding alignment pins.

3. The acetabular system of claim 2, wherein the plurality of guiding formations includes three guiding bores and the plurality of apertures of the patient-specific alignment adapter includes three corresponding apertures.

4. The acetabular system of claim 2, wherein the guiding formations are parallel guiding bores.

5. The acetabular system of claim 4, further comprising an acetabular inserter, the acetabular inserter including a shaft passing through a snap-on side opening of the alignment adapter.

6. The acetabular system of claim 4, further comprising an acetabular inserter, the acetabular inserter including a shaft removably coupled to the alignment adapter and parallel to the guiding bores.

7. The acetabular system of claim 4, further comprising an acetabular impactor, the impactor including a shaft removably coupled to the alignment adapter and having a handle that is offset relative to a central portion of the shaft of the impactor.

8. The acetabular system of claim 4, wherein the patient-specific alignment adapter has a patient-specific surface and is slidable relative to the acetabular instrument.

9. An acetabular system comprising:

a patient specific acetabular alignment guide including a bone engagement surface configured and shaped to be conforming and complementary to an acetabular and periacetabular area of an acetabulum of a specific patient in accordance with a three-dimensional model of the acetabulum of the specific patient and based on a pre-operative plan, the acetabular alignment guide including a plurality of guiding formations extending therethrough for guiding a plurality of alignment pins in a periacetabular area of a patient;

an acetabular instrument including a handle, a shaft and an acetabular coupler; and

a first alignment adapter removably coupled to the shaft of the acetabular instrument, the first alignment adapter including a plurality of apertures configured to correspond to the guiding formations of the acetabular alignment guide, such that the alignment pins can pass through the apertures of the alignment adapter after the acetabular alignment guide is removed without removing the alignment pins from the patient.

10. The acetabular system of claim 9, wherein the shaft of the acetabular instrument is removably inserted through a coupling opening of the first alignment adapter.

11. The acetabular system of claim 10, wherein the coupling opening is a snap-on side opening.

12. The acetabular system of claim 9, further comprising a second acetabular instrument having a shaft removably couplable to the first alignment adapter.

13. The acetabular system of claim 9, further comprising:

an acetabular impactor having a handle and a shaft offset from the handle; and

a second alignment adapter removably coupled to the shaft of the acetabular impactor, the second alignment adapter including a plurality of apertures complementary to the guiding formations of the acetabular alignment guide, such that the alignment pins can pass through the apertures of the second alignment adapter after the acetabular alignment guide is removed without removing the alignment pins from the patient.

14. The acetabular system of claim 13, wherein the shaft of the acetabular impactor is removably inserted through a coupling opening of the second alignment adapter.

15. The acetabular system of claim 14, wherein the coupling opening is a snap-on side opening.

16. The acetabular system of claim 14, wherein the impactor is modular.

17. The acetabular system of claim 9, further comprising an acetabular implant.