CA2511216A1 - High performance knee prostheses - Google Patents

High performance knee prostheses Download PDF

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Publication number
CA2511216A1
CA2511216A1 CA002511216A CA2511216A CA2511216A1 CA 2511216 A1 CA2511216 A1 CA 2511216A1 CA 002511216 A CA002511216 A CA 002511216A CA 2511216 A CA2511216 A CA 2511216A CA 2511216 A1 CA2511216 A1 CA 2511216A1
Authority
CA
Canada
Prior art keywords
knee prosthesis
further characterized
femoral component
tibia
lateral
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002511216A
Other languages
French (fr)
Other versions
CA2511216C (en
Inventor
Jason K. Otto
Michael Ries
Jan Victor
Johan Bellemans
Jonathan Garino
Dean Hughes
Brian Mckinnon
Timothy Wilton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smith and Nephew Inc
University of Pennsylvania Penn
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2511216A1 publication Critical patent/CA2511216A1/en
Application granted granted Critical
Publication of CA2511216C publication Critical patent/CA2511216C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/3886—Joints for elbows or knees for stabilising knees against anterior or lateral dislocations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/3836—Special connection between upper and lower leg, e.g. constrained
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/3859—Femoral components
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/389—Tibial components
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/3868—Joints for elbows or knees with sliding tibial bearing

Abstract

Knee prostheses (100) featuring components that more faithfully replicate th e structure and function of the human knee joint in order to provide, among other benefits: greater flexion of the knee in a more natural way by promoti ng or at least accommodating internal tibial rotation in a controlled way, replication of the natural screw home mechanism, and controlled articulation of the tibia and femur respective to each other in a more natural way. In a preferred embodiment, such prostheses include an insert component (400) disposed between a femoral component (200) and a tibial component, the inser t component (400) preferably featuring among other things a reversely contoure d posteriolateral bearing surface (444) that helps impart internal rotation to the tibia as the knee flexes. Other surfaces can also be specially shaped to achieve similar results, preferably using iterative automated techniques tha t allow testing and iterative design taking into account a manageable set of major forces acting on the knee during normal functioning, together with information that is known about natural knee joint kinetics and kinematics.< /SDOAB>

Claims (12)

1. A knee prosthesis comprising a femoral component adapted to fit on a distal end of a femur, the femoral component which includes a lateral condylar structure and a medial condylar structure;
and an accommodation structure which includes a lateral proximal surface adapted to cooperate with the lateral condylar structure of the femoral component, and a medial proximal surface adapted to cooperate with the medial condylar structure of the femoral component, the femoral component characterized in that the geometry of the lateral condylar structure is different from the geometry of the medial condylar structure; and the accommodation structure characterized in that the geometry of the lateral proximal surface and the medial proximal surface are different from each other, to assist in imparting internal rotation on a tibia relative to the femoral component as the knee flexes from substantially zero degrees of flexion to substantially 130 degrees of flexion.
2. The knee prosthesis of claim 1, further characterized in that at least one of the differences in geometry is a difference in size.
3. The knee prosthesis of claim 1, further characterized in that at least one of the differences in geometry is a difference in shape.
4. The knee prosthesis of claim 1, further characterized in that the accommodation structure includes a posteriolateral proximal surface adapted to cooperate with the lateral condylar structure of the femoral component in at least some angles of flexion of the tibia relative to the femur to impart internal rotation of the tibia relative to the femur.
5. The knee prosthesis of claim 1 further characterized in that the accommodation structure is a component that is mounted on a tibia.
6. The knee prosthesis of claim 1 further characterized in that the accommodation structure is part of a tibial implant.
7. The knee prosthesis of claim further characterized in that the accommodation structure is part of an insert which is adapted to fit between the femoral component and a tibial implant.
8. The knee prosthesis of claim 4 further characterized in that the posteriolateral surface includes a portion that is convex.
9. The knee prosthesis of claim 4 further characterized in that the posteriolateral surface includes a portion that is substantially flat.
10. The knee prosthesis of claim 4 further characterized in that the posteriolateral surface includes a portion that is substantially concave.
11. The knee prosthesis of claim 7 further comprising a tibial implant.
12. The knee prosthesis of claim 1 further characterized in that the internal rotation of the tibia is at least substantially 8 degrees relative to the femur at substantially 130 degees of flexion and greater flexion angles.

14. The knee prosthesis of claim 1 further characterized in that the accommodation structure is thicker in at least some areas that cooperate with the lateral condylar structure of the femoral component than in corresponding areas that cooperate with the medial condylar structure of the femoral component.

15. The knee prosthesis of claim 1 further characterized in that a line between the distal most surfaces of the medial condylar structure and the lateral condylar structure, at a flexion angle of substantially zero degrees, is oriented at an angle of approximately 3 degrees from a line that is perpendicular to the mechanical axis of a leg in which the knee prosthesis is implanted.

16. The knee prosthesis of claim 1 further characterized in that the accommodation structure comprises a raised portion on a proximal surface and the femoral component includes a cam having a surface for cooperating with an anterior surface of the raised portion in order to provide an anterior stabilizing force at some angles of flexion.

17. The knee prosthesis of claim 1 further characterized in that the accommodation structure comprises a raised portion on a proximal surface and the femoral component includes a cam which includes a surface for cooperating with a posterior surface of the raised surface on the accommodation structure in order to assist in imparting internal rotation to the tibia relative to the femur at angles of flexion between the tibia and the femur of 50 degrees or greater.

18. The knee prosthesis of claim 17 further characterized in that the cam has an asymmetrical shape such that the lateral side of the cam is larger than the medial side.

19. The knee prosthesis of claim 1 wherein the accommodation structure incluldes edges adjacent its proxmial surface which are rounded.

20. The knee prosthesis of claim 1 further characterized in that the accommodation structure and the femoral component are configured to allow the femur and tibia to flex approximately 155° relative to each other, and whereby at said 155° angle, the tibia is internally rotated at an angle of at least substantially 8 degrees relative to the femur.

21. The knee prosthesis of claim 1 further characterized in that lateral portions of the femoral component anterior surface extend further in an anterior direction than medial portions of the femoral component anterior surface, whereby the anterior surface of the femoral component is adapted to assist in precluding subluxation of the patella.

22. The knee prosthesis of claim 1 further characterized in that the accommodation structure includes a proximal lateral surface with an arcuate swept surface, the swept surface adapted to assist in guiding tracking of lateral structure of the femoral component on the proximal surface during at least some ranges of flexion between the tibia and the femur.

23. The knee prosthesis of claim 1 further characterized in that the posterior surface of the medial condylar portion of the femoral component extends no farther than approximately 2 mm beyond the posterior surface of the accommodation structure at substantially full extension.
CA2511216A 2002-12-20 2003-12-22 High performance knee prostheses Expired - Lifetime CA2511216C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US43542602P 2002-12-20 2002-12-20
US60/435,426 2002-12-20
PCT/US2003/041088 WO2004058108A1 (en) 2002-12-20 2003-12-22 High performance knee prostheses

Publications (2)

Publication Number Publication Date
CA2511216A1 true CA2511216A1 (en) 2004-07-15
CA2511216C CA2511216C (en) 2011-02-01

Family

ID=32682240

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2511216A Expired - Lifetime CA2511216C (en) 2002-12-20 2003-12-22 High performance knee prostheses

Country Status (9)

Country Link
US (19) US7326252B2 (en)
EP (2) EP2316385B1 (en)
JP (2) JP4943655B2 (en)
AT (1) ATE497741T1 (en)
AU (2) AU2003299851B2 (en)
CA (1) CA2511216C (en)
DE (1) DE60336013D1 (en)
ES (2) ES2363767T3 (en)
WO (1) WO2004058108A1 (en)

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