Method and apparatus for constructing a modular acetabulum

• US 8,048,166 B2
• Filed: 03/20/2006
• Issued: 11/01/2011
• Est. Priority Date: 05/04/2004
• Status: Expired due to Fees

• 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
• Primary Examiner(s): Ramana; Anu
• Application Number:
  US11/385,004
• Publication Number:
  US 20060161261A1
• Time in Patent Office: 2,052 Days
• Field of Search: 623/16.11, 623/18.11, 623/22.11, 623/22.21, 623/22.22
• US Class Current: 623/22.21
• 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 first portion of a hip bone, the hip bone divided by a median plane, the prosthetic system comprising:

a plurality of acetabular components, each acetabular component having a first connection portion and a second connection portion, an angle defined between said respective first and second connection portions varying between said plurality of acetabular components;

a plurality of flange components; and

a plurality of pubis components, each of said pubis components operable to connect to each of said acetabular components via said respective second connection portion thereof, each of said flange components operable to connect to each of said acetabular components via said respective first connection portion thereof, each of said pubis components including a first terminal end, a second terminal end, and an intermediate portion between said first and second terminal ends, said first terminal end operable to connect to each of said acetabular components via said respective second connection portion thereof, said second terminal end defining a clamping portion, said intermediate portion configured to allow the clamping portion to attach to an opposed healthy pubis bone that is disposed on an opposite side of the median plane from the first portion of the hip bone.

2. The prosthetic system of claim 1 wherein a taper connection is formed between at least one of said acetabular components and at least one of said pubis components and flange components.

3. The prosthetic system of claim 1, wherein at least one of said first and second connection portions includes a post that extends from said respective acetabular component, and wherein at least one of said plurality of flange components and pubis components includes a bore that receives the post.

4. The prosthetic system of claim 1, wherein at least one of said first and second connection portions includes a bore, and wherein at least one of said plurality of flange components and pubis components includes a post this is received in said bore.

5. 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, and a circularity vary between said plurality of acetabular components.

6. 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.

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

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

a plurality of acetabular components, each acetabular component having a first connection portion and a second connection portion, an angle defined between said respective first and second connection portions varying between said plurality of acetabular components;

a plurality of flange components; and

a plurality of pubis components, each of said pubis components operable to connect to each of said acetabular components via said respective second connection portion thereof, each of said flange components operable to connect to each of said acetabular components via said respective first connection portion thereof, each of said pubis components defining a clamping portion that is configured to attach to an opposed healthy pubis bone, wherein each of said pubis components includes a worm drive that clamps against said clamping portion.

9. The prosthetic system of claim 8 further comprising a catch plate, said worm drive moves said catch plate relative to said clamping portion.

10. The prosthetic system of claim 9 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.

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

a plurality of acetabular components, each acetabular component having a first connection portion and a second connection portion, an angle defined between said respective first and second connection portions varying between said plurality of acetabular components;

a plurality of flange components;

a plurality of pubis components, each of said pubis components operable to connect to each of said acetabular components via said respective second connection portion thereof, each of said flange components operable to connect to each of said acetabular components via said respective first connection portion thereof, each of said pubis components defining a clamping portion that is configured to attach to an opposed healthy pubis bone; and

at least one extension component, the at least one extension component either operable to connect one of said acetabular components and one of said flange components or operable to connect one of said acetabular components and one of said pubis components.

12. The prosthetic system of claim 11 further comprising a plurality of extension components having varying lengths.

13. A prosthetic device for a hip bone comprising:

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

a pubis component including a clamping portion configured to attach to a pubis bone of the hip bone, and further including a worm drive configured to clamp said pubis component against said pubis bone; and

an acetabular component having a first connection portion operable to removably connect to the flange component and a second connection portion operable to removably connect to the pubis component.

14. A prosthetic device for a hip bone comprising:

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

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

an acetabular component operable to removably connect to said flange component, said acetabular component also operable to connect to said pubis component; and

an extension component, said extension component operable to removably connect directly to said acetabular component, said extension component also operable to removably connect directly to either said pubis component, said flange component, or another extension component.

15. The prosthetic device of claim 14 further comprising a connection between said acetabular component and at least one of said pubis component, said extension component and said flange component, said connection selected from a group consisting of a taper connection, a post and bore connection, and a threaded connection, wherein the bore receives the post.

16. A method of replacing a portion of a hip bone with a prosthetic hip bone, the hip bone divided by a median plane, the portion of the hip bone disposed on a first side of the median plane, an opposed pubis bone disposed on a second side of the median plane, the method comprising:

making at least one incision;

removing the portion of the hip bone from the patient;

selecting an acetabular component from a plurality of acetabular components, each of said acetabular components having a first connection portion and a second connection portion, an angle defined between said first and second connection portions for each of said acetabular components, said angle varying between said plurality of acetabular components;

connecting a second end of a pubis component of the prosthetic hip bone to the opposed pubis bone;

extending said pubis component across the median plane;

connecting a first end of said pubis component to said selected acetabular component; and

operably coupling the first connection portion of the acetabular component to the hip bone such that said acetabular component and said first end of said pubis component are disposed on the first side of the median plane.

17. The method of Claim 16 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.

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

making at least one incision;

removing the portion of the hip bone from the patient, leaving a remaining portion of the hip bone;

selecting an acetabular component from a plurality of acetabular components, each of said acetabular components having a first connection portion and a second connection portion, an angle defined between said first and second connection portions for each of said acetabular components, said angle varying between said plurality of acetabular components;

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

connecting a flange component of the prosthetic hip bone to the remaining portion of the hip bone;

connecting said first connection portion of said selected acetabular component to said flange component;

connecting said second connection portion of said selected acetabular component to said pubis component; and

rotating a worm drive in said pubis component to secure the prosthetic hip bone to the opposed pubis bone.