Patient specific acetabular guide and method

• US 8,133,234 B2
• Filed: 02/20/2009
• Issued: 03/13/2012
• 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: Meridew, Jason D., Metzger, Robert
• Primary Examiner(s): Stewart, Alvin J
• Application Number:
  US12/389,901
• Publication Number:
  US 20090163922A1
• Time in Patent Office: 1,117 Days
• Field of Search: 623 1811- 2011, 623 2221- 224, 606/91, 606/92, 606/93, 606/99, 606/86.R, 606 79- 81
• US Class Current: 606/91
• CPC Class Codes: A61B 17/1746 for the acetabulum
• CPC Class Codes: A61B 2017/22001 Angioplasty, e.g. PCTA
• CPC Class Codes: A61B 2017/568 produced with shape and dimensions specific for an individual patient
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations
• CPC Class Codes: A61F 2/00 Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents as cosmetic articles, see the relevant subclasses, e.g. wigs, hair pieces, A41G3/00, A41G5/00; artificial nails A45D31/00; dental prostheses A61C13/00; materials for prostheses A61L27/00; artificial hearts A61M60/00; artificial kidneys A61M1/14
• 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 2/4609 of acetabular cups
• CPC Class Codes: A61F 2002/30617 Visible markings for adjusting, locating or measuring
• 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 system includes an acetabular guide having a first surface and a second surface opposite to the first surface, the first surface made to conform to an acetabular rim surface around an acetabulum of a patient in accordance with a three-dimensional image of the acetabulum of the patient. The acetabular guide includes an aperture having an inner surface oriented at selected anteversion and abduction angles relative to the first surface for guiding an acetabular implant into the acetabulum at the selected anteversion and abduction angles.

Claims

1. An acetabular system comprising:

an acetabular guide including a first surface and a second surface opposite to the first surface, the first surface preoperatively configured as a mirror surface of an acetabular rim surface around an acetabulum of a patient from a three-dimensional image of the acetabulum of the specific patient, the acetabular guide including an aperture having an inner surface oriented at preoperatively determined and patient-specific anteversion and abduction angles relative to the first surface for guiding an acetabular implant into the acetabulum at the anteversion and abduction angles.

2. The acetabular system of claim 1, further comprising an acetabular inserter, the acetabular inserter including a guide-engaging portion, the guide-engaging portion including an outer surface preoperatively configured to mate with the inner surface of the acetabular guide at the patient-specific anteversion and abduction angles.

3. The acetabular system of claim 2, wherein the acetabular inserter includes a handle with a proximal impaction surface.

4. The acetabular system of claim 2, wherein the guide-engaging portion includes a surface having a planar portion indicative of an impaction depth of an acetabular implant.

5. The acetabular system of claim 2, wherein the acetabular inserter includes a distal portion couplable to an acetabular implant.

6. The acetabular system of claim 2, wherein the acetabular inserter includes a bushing couplable to an intermediate member, the intermediate member engageable with the acetabular implant.

7. The acetabular system of claim 2, wherein the acetabular guide includes a plurality of peripheral openings for temporary fasteners.

8. The acetabular system of claim 2, wherein the inner surface of the acetabular guide and the outer surface of the acetabular inserter are cylindrical.

9. An acetabular system comprising:

an annular acetabular guide including a first surface and a second surface opposite to the first surface, the first surface being patient-specific and preoperatively configured as a mirror surface of an acetabular rim surface around an acetabulum of a patient from a three-dimensional image of the acetabulum of the patient, the acetabular guide including a cylindrical inner surface oriented at preoperatively determined and patient-specific anteversion and abduction angles relative to the first surface; and

an acetabular inserter including a guide-engaging portion, the guide-engaging portion including a cylindrical outer surface preoperatively configured to mate with the cylindrical inner surface of the acetabular guide at the patient-specific anteversion and abduction angles.

10. The acetabular system of claim 9, wherein the acetabular inserter includes a handle with a proximal impaction surface.

11. The acetabular system of claim 9, wherein the acetabular inserter includes a distal ball-bearing bushing.

12. The acetabular system of claim 11, further comprising an intermediate member having a receptacle engageable with the bushing.

13. The acetabular system of claim 12, wherein the intermediate member includes a plurality of fingers couplable to a corresponding plurality of slots of an acetabular cup.

14. The acetabular system of claim 9, wherein the guide-engaging portion includes a surface with a flat portion indicative of an impaction depth of an acetabular cup.

15. The acetabular system of claim 14, wherein the acetabular guide includes a plurality of peripheral openings receiving temporary fixators.

16. The acetabular system of claim 14, in combination with an acetabular cup inserted by the acetabular inserter through the acetabular guide.

17. The acetabular system of claim 14, wherein the cylindrical outer surface of the acetabular inserter includes indicia of impaction depth of an acetabular cup.

18. An acetabular system comprising:

a patient-specific annular acetabular guide including a first surface, a second surface opposite to the first surface and an opening between the first and second surfaces, wherein the first surface is patient-specific and preoperatively configured as a mirror surface of an acetabular rim surface around an acetabulum of a patient from a three-dimensional image of the acetabulum of the patient, and wherein the opening of the acetabular guide has a cylindrical inner surface oriented at preoperatively determined patient-specific anteversion and abduction angles relative to the first surface;

an acetabular implant; and

an acetabular inserter engageable with the acetabular implant and including a portion with a cylindrical outer surface preoperatively configured to mate with the cylindrical inner surface of the acetabular guide for guiding the acetabular implant into the acetabulum of the patient along the patient-specific anteversion and abduction angles.