Patient-specific acetabular alignment guides

• US 9,480,580 B2
• Filed: 12/09/2013
• Issued: 11/01/2016
• 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): Hanna, Samuel
• Application Number:
  US14/100,134
• Publication Number:
  US 20140094816A1
• Time in Patent Office: 1,058 Days
• US Class Current: 1/1
• 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

A method for inserting an acetabular implant into the acetabulum of a patient. The method includes engaging a patient-specific surface of acetabular alignment guide to a complementary rim surface and periacetabular area of a patient. A plurality of alignment pins are inserted through corresponding alignment apertures of the acetabular alignment guide and into the periacetabular area of the patient. The acetabular alignment guide is removed without removing the alignment pins from the patient. An alignment adapter is coupled to an acetabular inserter over the alignment pins and an acetabular implant is implanted using the acetabular inserter.

Claims

1. A method for inserting an acetabular implant into an acetabulum of a patient, the method comprising:

engaging a patient-specific surface of an acetabular alignment guide to a complementary rim surface and periacetabular area of a pelvis outside the acetabulum of the patient;

wherein the patient-specific surface of the acetabular alignment guide includes a three-dimensional anatomic engagement surface configured to conform and match to a three-dimensional bone surface of the rim and the periacetabular area of the pelvis of the patient;

inserting a plurality of alignment pins through corresponding alignment apertures of the acetabular alignment guide and into the periacetabular area of the pelvis outside the acetabulum of the patient;

removing the acetabular alignment guide without removing the alignment pins from the periacetabular area of the pelvis of the patient;

guiding a first alignment adapter coupled to an acetabular inserter over the alignment pins; and

implanting the acetabular implant in the acetabulum with the acetabular inserter, the acetabular inserter holding the acetabular implant.

2. The method of claim 1, wherein guiding a first alignment adapter coupled to an acetabular implant inserter over the alignment pins comprises inserting the alignment pins through complementary apertures of the first alignment adapter.

3. The method of claim 1, further comprising:

removing the acetabular inserter and the first alignment adapter;

guiding a second alignment adapter coupled to an impactor over the alignment pins; and

impacting the acetabular implant with the impactor.

4. The method of claim 3, wherein guiding a second alignment adapter coupled to an impactor over the alignment pins comprises inserting the alignment pins through complementary apertures of the second alignment adapter.

5. The method of claim 4, wherein the first and second alignment adapters are identical.

6. The method of claim 4, wherein the impactor is an offset impactor having a drive shaft offset relative to a center axis of the second alignment adapter and wherein the first and second alignment adapters are different.

7. A method for inserting an acetabular implant into an acetabulum of a patient, the method comprising:

engaging a first portion of a patient-specific acetabular alignment guide to a portion of a rim surface of the acetabulum of a pelvis of the patient, the first portion shaped to be conforming only to the rim surface without extending into the acetabulum of the pelvis of the patient;

engaging a second portion of the patient-specific acetabular alignment guide to a periacetabular area outside the acetabulum of the patient, the second portion shaped to be conforming to the periacetabular area of the pelvis of the patient;

wherein the first and second portions of the patient-specific acetabular alignment guide include three-dimensional anatomic engagement surfaces configured to conform and match to three-dimensional bone surfaces of the rim and the periacetabular area of the pelvis of the patient;

inserting a plurality of alignment pins through corresponding alignment apertures of the second portion of the acetabular alignment guide and into the periacetabular area of the pelvis of the patient;

removing the acetabular alignment guide without removing the alignment pins from the pelvis of the patient;

guiding the acetabular implant into the acetabulum using the alignment pins;

wherein guiding the acetabular implant into the acetabulum using the alignment pins includes;

guiding a first alignment adapter coupled to an acetabular inserter over the alignment pins; and

implanting the acetabular implant into the acetabulum with the acetabular inserter.

8. The method of claim 7, wherein guiding a first alignment adapter coupled to an acetabular implant inserter over the alignment pins comprises inserting the alignment pins through complementary apertures of the first alignment adapter.

9. The method of claim 7, further comprising:

removing the acetabular inserter and the first alignment adapter;

guiding a second alignment adapter coupled to an impactor over the alignment pins; and

impacting the acetabular implant with the impactor.

10. The method of claim 9, wherein guiding a second alignment adapter coupled to an impactor over the alignment pins comprises inserting the alignment pins through complementary apertures of the second alignment adapter.

11. The method of claim 9, wherein the first and second alignment adapters are identical.

12. The method of claim 9, wherein the impactor is an offset impactor having a drive shaft offset relative to a center axis of the second alignment adapter and wherein the first and second alignment adapters are different.

13. The method of claim 7, wherein the first alignment adaptor has a patient-specific surface and is slidable relative to the acetabular inserter.

14. A method for inserting an acetabular implant into an acetabulum of a patient, the method comprising:

engaging a first portion of a patient-specific acetabular alignment guide to a portion of a rim surface of the acetabulum of a pelvis of the patient, the first portion shaped to be conforming only to the rim surface without extending into the acetabulum of the patient;

engaging a second portion of the patient-specific acetabular alignment guide to a periacetabular area outside the acetabulum of a patient, the second portion shaped to be conforming to the periacetabular area of the pelvis of the patient and having a plurality of patient-specific alignment bores;

wherein the first and second portions of the patient-specific acetabular alignment guide include three-dimensional anatomic engagement surfaces configured to conform and match to three-dimensional bone surfaces of the rim and the periacetabular area of the pelvis of the patient;

inserting a plurality of alignment pins through the corresponding alignment bores of the second portion of the acetabular alignment guide and into the periacetabular area of the pelvis of the patient;

removing the acetabular alignment guide without removing the alignment pins from the periacetabular area of the pelvis of the patient;

guiding a patient specific alignment adapter having a plurality of alignment bores complementary to the alignment bores of the second portion of the acetabular alignment guide over the alignment pins;

coupling an acetabular inserter to the patient-specific alignment adapter;

coupling the acetabular implant to the acetabular inserter; and

implanting the acetabular implant into the acetabulum by sliding the patient specific alignment adaptor coupled to the acetabular inserter along the alignment pins.

15. The method of claim 14, wherein coupling an acetabular inserter to the patient-specific alignment adaptor comprises passing a shaft of the acetabular inserter through a snap-on side opening of the alignment adapter.

16. The method of claim 14, wherein coupling an acetabular inserter to the patient-specific alignment adaptor comprises removably coupling a shaft of the acetabular inserter to the alignment adapter parallel to the alignment bores of the alignment adapter.

17. The method of claim 14, wherein the alignment adaptor has a patient-specific surface and is slidable relative to the acetabular inserter.

18. The method of claim 14, further comprising:

removing the acetabular inserter;

coupling the alignment adapter to an impactor; and

impacting the acetabular implant with the impactor.

19. The method of claim 18, wherein the impactor has a handle and a shaft offset from the handle.