Modular joint

• US 6,629,999 B1
• Filed: 03/06/2000
• Issued: 10/07/2003
• Est. Priority Date: 03/08/1999
• Status: Expired due to Term

• Current Assignee: Louis A. Serefin Jr. Trust
• Original Assignee: Zimmer Technology Incorporated (Zimmer Biomet Holdings, Inc.)
• Inventors: Serafin, Louis A. Jr.
• Primary Examiner(s): McDermott, Corrine
• Assistant Examiner(s): STEWART, ALVIN J
• Application Number:
  US09/518,888
• Time in Patent Office: 1,310 Days
• Field of Search: 623/20.15, 623/20.14, 623/20.24, 623/20.25, 623/20.26, 623/20.27, 623/20.28, 623/20.29, 623/20.34, 623/20.35
• US Class Current: 623/20.15
• CPC Class Codes: A61B 17/68 Internal fixation devices , including fasteners and spinal fixators, even if a part thereof projects from the skin bone staples A61B17/0642
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• 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 2/384 hinged, i.e. with transverse axle restricting the movement
• CPC Class Codes: A61F 2/3845 allowing only for single rotation
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/3886 for stabilising knees against anterior or lateral dislocations
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2002/30354 Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
• CPC Class Codes: A61F 2002/30364 Rotation about the common longitudinal axis
• CPC Class Codes: A61F 2002/30405 made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30492 using a locking pin
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30607 Kits of prosthetic parts to be assembled in various combinations for forming different prostheses
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30624 Hinged joint, e.g. with transverse axle restricting the movement
• CPC Class Codes: A61F 2002/30708 Means for distinguishing between left-sided and right-sided devices, Sets comprising both left-sided and right-sided prosthetic parts
• CPC Class Codes: A61F 2002/30795 Blind bores, e.g. of circular cross-section
• CPC Class Codes: A61F 2002/30797 : internally-threaded
• CPC Class Codes: A61F 2002/30841 : Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• 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 2002/30884 : Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
• 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 2220/0041 : using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2250/0062 : Kits of prosthetic parts to be assembled in various combinations for forming different prostheses
• CPC Class Codes: A61F 2250/0084 : Means for distinguishing between left-sided and right-sided devices; Sets comprising both left-sided and right-sided prosthetic parts
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium

Abstract

Basic implantable joint is adapted such that addable component(s) thereto can be added to the basic joint without removal of the joint from the site to which it can be initially implanted to provide a modular joint. Other modular features to a basic implantable joint are provided as well. The modular joint can be, for example, that of the knee and include a basic, implantable femoral component, with the addable component(s) able to be added inter-condylarly, which, for example, can include an insertable rotation device with a swingable, depending male type part; intramedullary spike and/or posterior stabilizing stop.

Claims

1. A modular joint comprising a basic implantable joint structured to function as a first complete joint, which contains an adaptation configured such that at least one addable component can be added to the basic joint to form a second complete joint without removal of the joint from a site to which it can be initially implanted.

2. The joint of claim 1, which is a ginglymous type joint.

3. The joint of claim 2, having module-in-module capability.

4. The joint of claim 3, having box-in-box capability.

5. The joint of claim 2, which is a knee joint prosthesis.

6. The joint of claim 3, which is a knee joint prosthesis.

7. The joint of claim 4, which is a knee joint prosthesis.

8. The joint of claim 5, which is has at least one joint component selected from the group consisting of an implantable femoral component and an implantable tibial component, wherein at least one of said at least one joint component contains an adaptation such that at least one addable component can be added thereto without removal of the joint component from a site to which it can be initially implanted.

9. The joint of claim 8, wherein said joint component includes said femoral component, and said at least one addable component can be added inter-condylarly.

10. The joint of claim 9, wherein said at least one addable component is selected from the group consisting of an insertable rotation device with a swingable, depending male type part;

an intramedullary spike; and

a posterior stabilizing stop.

11. The joint of claim 10, wherein said at least one addable component includes said rotation device, wherein said rotation device is inferiorly insertable, and mounted in an insertable box for insertion into a corresponding receiving housing of said femoral component.

12. The joint of claim 11, which also includes said tibial component, and there is metal-on-metal articulation by having articulating surfaces of said femoral component and said tibial component made of metal.

13. In an artificial joint, which generally has natural load transfer capability, which includes a first component including a first articular surface and a rotation device, wherein the rotation device includes a swingable, depending male-type part;

and a second component including a second articular surface for mating with the first articular surface, and a rotation device receptacle, wherein the rotation device receptacle includes a female-type part—

said first component matable to said second component through male-female cooperation of the rotation device and the rotation device receptacle, and wherein said first component can cooperate with said second component in contact of the first and second articular surfaces and in articulation of the joint when said first component is mated to said second component, wherein said first and second articular surfaces are such that they can have anatomical gliding contact against one another during anatomical rotation in addition to anatomical flexion and extension—

the improvement which comprises an adaptation such that at least one addable component can be added to the basic joint, which is structured to function as a first complete joint, to form a second, complete configuration of the joint without removal of the joint from a site to which it can be initially implanted.

14. The joint of claim 13, which is a knee joint prosthesis having femoral and tibial components, and said at least one addable component includes at least one intramedullary spike.

15. The joint of claim 14, which is a knee joint prosthesis having femoral and tibial components, and said at least one addable component includes as the rotation device a modular, inferiorly insertable rotation device.

16. The joint of claim 13, which is a knee joint prosthesis having femoral and tibial components, and said at least one addable component includes as the rotation device a modular, inferiorly insertable rotation device.

17. The joint of claim 13, wherein said first and second articular surfaces are made of metal so as to provide metal-on-metal articulation.

18. In an artificial femoral component for a knee, which includes the following:

a femoral component frame, which includes two side walls connected to a front wall, the same being connectable in proximal and deep directions to distal condylar, posterior and anterior flanges, with said distal flange connected to said posterior and anterior flanges;

a smooth condylar surface of generally convex geometry connected to the femoral component frame in distal and superficial directions, which includes an inferior, medial condyle;

an inferior, lateral condyle;

a posterior, medial condyle;

a posterior, lateral condyle;

an anterior, medial condyle; and

an anterior, lateral condyle;

plus a trochlear surface on a superficial side of the anterior flange, on which a trochlea may generally ride;

said condylar surface being such that an inter-condylar notch is present between medial and lateral condyles; and

a rotation device connected to the femoral component frame, which includes the following;

an angular rotation member having a rotation member hole in a proximal extremity thereto, which hole spans the rotation member in a medial to lateral direction, which rotation member about a distal extremity thereof can be inserted into a corresponding receptacle in a tibial tray; and

an axle passing through the hole which spans the rotation member and is connected to a frame through holes in side walls thereof;

the improvement which comprises as the rotation device a modular, inferiorly insertable rotation device, which can be inserted into and removed from a corresponding receptacle in the femoral component frame, wherein the angular rotation member is connected to the axle which is connected to walls of the modular, inferiorly insertable rotation device by holes in said walls through which the axle passes.

19. An addable component for a modular ginglymous type joint implant comprising a housing having at least one flat side;

an axle attached to the housing for receiving a rotation member; and

the rotation member received on and depending from the axle, the rotation member being a male type part—

wherein the addable component can be added to the modular ginglymous type joint.

20. The addable component of claim 19, wherein the modular ginglymous type joint implant is a femoral component of a knee implant having lateral and medial condyles;

the addable component is inferiorly insertable between said condyles of the knee implant, and the rotation member has a generally cylindrical lower restraining post portion which can be inserted into a closely conforming receptacle in a tibial component.

21. The addable component of claim 20, wherein the housing is boxlixe in shape.

22. An artificial femoral component for a knee, which comprises the following:

a femoral component frame, which includes two side walls connected to a front wall, the same being connectable in proximal and deep directions to distal condylar, posterior and anterior flanges, with said distal flange connected to said posterior and anterior flanges;

a smooth condylar surface of generally convex geometry connected to the femoral component frame in distal and superficial directions, which includes an inferior, medial condyle;

an inferior, lateral condyle;

a posterior, medial condyle;

a posterior, lateral condyle;

an anterior, medial condyle; and

an anterior, lateral condyle;

plus a trochlear surface on a superficial side of the anterior flange, on which a trochlea may generally ride;

said condylar surface being such that an inter-condylar notch is present between medial and lateral condyles; and

a receiving housing in the femoral component frame and generally between lateral and medial condyles, said receiving housing able to receive a modular component insert therein.

23. The component of claim 22, wherein said receiving housing is in the form of a box having opposing side walls, a top wall, and an insert restraining front wall.

24. The component of claim 23, wherein said side walls are tapered with respect to one another.

25. The component of claim 24, further having at least one hole in at least one of said side, top, and front walls.

26. The component of claim 23, further having at least one hole in at least one of said side, top, and front walls.

27. A modular joint comprising a basic implantable joint which has natural load transfer capability, which is structured to function as a first complete joint, and which contains an adaptation configured such that at least one addable component can be added to the basic joint to form a second complete joint without removal of the joint from a site to which it can be initially implanted.

28. The joint of claim 27, which is a ginglymous type joint.

29. The joint of claim 28, which is a knee joint prosthesis.

30. The joint of claim 29, wherein the joint component includes a femoral component, and the at least one addable component can be added inter-condylarly and is selected from the group consisting of an insertable rotation device with a swingable, depending male type part;

an intramedullary spike; and

a posterior stabilizing stop.

31. The joint of claim 29, wherein the at least one addable component is selected from the group consisting of an intramedullary spike and a posterior stabilizing stop.