Method and apparatus for constructing a modular acetabulum

• US 20060161261A1
• Filed: 03/20/2006
• Published: 07/20/2006
• Est. Priority Date: 05/04/2004
• 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., May, Brian M., Bollinger, Mark A., Brown, David R.
• Granted Patent: US 8,048,166 B2
• Time in Patent Office: Days
• US Class Current: 623/22.220
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• CPC Class Codes: A61F 2/30721 Accessories
• CPC Class Codes: A61F 2/30749 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2/32 for the hip
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/3662 Femoral shafts
• CPC Class Codes: A61F 2002/30329 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30339 Double cones, i.e. connecting element having two conical connections, one at each of its opposite ends
• CPC Class Codes: A61F 2002/30354 Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
• CPC Class Codes: A61F 2002/30405 made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30505 spring biased
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30525 Worm gears
• CPC Class Codes: A61F 2002/30538 for adjusting angular orientation
• CPC Class Codes: A61F 2002/30578 having apertures, e.g. for receiving fixation screws
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30878 : with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/30894 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30948 : using computerized tomography, i.e. CT scans
• CPC Class Codes: A61F 2002/30952 : using CAD-CAM techniques or NC-techniques
• CPC Class Codes: A61F 2002/3412 : with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface
• CPC Class Codes: A61F 2002/3611 : Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2002/4631 : the prosthesis being specially adapted for being cemented
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0033 : made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2250/0006 : for adjusting angular orientation
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium

Abstract

A prosthetic system for replacement of a portion of a hip bone including a plurality of acetabular components and a plurality of flange components. The prosthetic system also includes a plurality of pubis components. Each of the pubis components and each of the flange components are operable to connect to each of the acetabular components. Each of the pubis components define a clamping portion that is configured to attach to an opposed healthy pubis bone. An angle between the flange component and the pubis component varies among the acetabular components.

Claims

1. A prosthetic system for replacement of a portion of a hip bone comprising:

a plurality of acetabular components;

a plurality of flange components; and

a plurality of pubis components, each of said pubis components and each of said flange components operable to connect to each of said acetabular components, each of said pubis components defining a clamping portion that is configured to attach to an opposed healthy pubis bone, wherein an angle between said flange component and said pubis component varies among said acetabular components.

2. The prosthetic system of claim 1 wherein a taper connection is formed between at least two of said acetabular component, said pubis component and said acetabular component.

3. The prosthetic system of claim 1 wherein each of said pubis components includes a worm drive that clamps against said clamping portion.

4. The prosthetic system of claim 1 further comprising at least one extension component, said at least one extension component operable to connect with at least one of said acetabular component, said pubis component, and said flange component.

5. The prosthetic system of claim 4 further comprising a plurality of extension components having varying lengths.

6. The prosthetic system of claim 1 further comprising a post that extends from said acetabular component and is received by at least one of a bore defined by said pubis component, a bore defined by said extension component and a bore defined by said pubis component.

7. The prosthetic system of claim 1 further comprising a bore formed on said acetabular component that receives at least one of a post that extends from said pubis component, a post that extends from said extension component and a post that extends from said pubis component.

8. The prosthetic system of claim 1 wherein each of said plurality of acetabular components include an acetabular cup formed therein, wherein at least one of an inner diameter, a concavity, a circularity and combinations thereof vary in said plurality of acetabular components.

9. The prosthetic system of claim 1 wherein each of said plurality of pubis components include a length defined between about a receiving bore or a post and a clamping portion, wherein said length varies among said pubis components in said plurality of pubis components.

10. The prosthetic system of claim 1 further comprising a dimension defining a length of said pubis component varies among said pubis components.

11. The prosthetic system of claim 3 further comprising a catch plate, said worm drive moves said catch plate relative to said clamping portion.

13. The prosthetic system of claim 1 further comprising a compliant fixator that extends from a portion of at least one of said flange components, said compliant fixator is adapted to connect to a portion of the hip bone.

12. The prosthetic system of claim 12 further comprising a spring disposed between said catch plate and said worm drive, said spring biasing said catch plate against said clamping portion, said worm drive adjusting said biasing.

14. A prosthetic device for replacement of a hip bone comprising:

a flange component adapted to attach to remaining portions of the hemi-pelvis;

a pubis component including a clamping portion configured to attach to an opposed pubis bone and a worm drive configured to clamp said pubis component against said opposed pubis bone; and

an acetabular component having a dimension defined by a distance between a portion of said acetabular component operable to connect to at least said flange component and a portion of said acetabular component operable to connect to at least said pubis component, wherein said angle is based on said hip bone to be replaced.

15. The prosthetic device of claim 14 further comprising at least one extension component, said at least one extension component operable to connect to said acetabular component and at least one of said pubis component, said flange component, another extension component and combinations thereof.

16. The prosthetic device of claim 14 further comprising a connection between at least two of said acetabular component, said pubis component, said extension component and said flange component, said connection selected from a group consisting of at least one of a taper connection, a post and bore connection, a threaded connection and combinations thereof.

17. A method of replacing a portion of a hip bone with a prosthetic hip bone comprising:

making at least one incision;

removing at least a portion of the hip bone from the patient;

selecting an acetabular component from a plurality of acetabular components, each of said acetabular components defining an angle between two connections, said two connections associated with at least two of a pubis component, a extension component and a flange component, wherein said selecting of said acetabular component having said angle is at least based on the portion of the hip bone to be replaced;

implanting the prosthetic hip bone;

connecting a pubis component of the prosthetic hip bone to an opposed pubis bone; and

connecting an acetabular component to said pubis component

18. The method of claim 17 further comprising rotating a worm drive in said pubis component to secure the prosthetic hip bone to an opposed pubis bone.

19. The method of claim 17 selecting one of said pubis components from a plurality of pubis components, each of said pubis components defining a length of said pubis component, wherein said selecting of said pubis component having said length is at least based on the portion of the hip bone to be replaced.