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Torque-introducing full joint replacement prosthesis

A technology of prosthesis, femoral prosthesis, applied in the field of implanted prosthetic joints of natural biomechanics

Inactive Publication Date: 2009-05-13
DEPUY (IRELAND) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is controversy regarding the precise position of axial rotation (higher tibial insert versus lower relative tibial insert) in weight-bearing mobile TKA prostheses

Method used

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  • Torque-introducing full joint replacement prosthesis
  • Torque-introducing full joint replacement prosthesis
  • Torque-introducing full joint replacement prosthesis

Examples

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Embodiment Construction

[0060] Exemplary embodiments of the present invention are described and illustrated below so as to include methods of introducing moments in implanted prosthetic joints, and implantable prosthetic joints incorporating induced moments. Of course, it will be apparent to those skilled in the art that the preferred embodiments described below are exemplary in nature and modifications can be made without departing from the scope and spirit of the invention. However, for the sake of clarity and precision, the exemplary embodiments discussed below may include optional steps, methods and features that one of ordinary skill in the art would deem not necessary to fall within the scope of the invention.

[0061] The basic laws governing machinery come from Newton's laws: (A) Every object in a state of constant velocity tends to maintain that state of motion unless an external force is applied to it; (B) the object's mass m, its acceleration a and the applied The relationship between the ...

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Abstract

A prosthetic tibial insert comprises a tibial tray insert including a stabilizing post, where the centerline of the stabilizing post is offset from at least one of an anterior-posterior centerline and a medial-lateral centerline of the tibial tray insert. A method of imparting axial rotation comprises shifting the axis of axial rotation between a tibial prosthesis and a femoral prosthesis by providing at least one of offsetting a stabilizing post associated with a tibial insert, increasing the radii of a medial receiver of the tibial insert, and increasing conformity between a medial receiver of the tibial insert and a medial condyle.

Description

technical field [0001] The present invention relates to implanted prosthetic devices, and more particularly to implanted prosthetic joints that mimic the natural biomechanics of natural mammalian joints. The present invention also includes a method of introducing a moment in an implanted prosthetic joint and an implanted prosthetic device incorporating the introduced moment. Background technique [0002] Previous studies have demonstrated that the amount of rotation that occurs in the knee during walking and highly flexed activities is significantly different in natural knees (with no prior surgery and no history of clinical deformity) and surgically modified knees such as those undergoing total knee arthroplasty (TKA). Those knees vary greatly between those. During natural knee flexion, the axial femorotibial rotation pattern of the femur relative to the tibia results in internal rotation of the tibia relative to the femur and external rotation of the tibia relative to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/38
CPCA61F2/3886A61F2/3868A61F2/389A61F2/3859A61F2002/30518A61F2/38A61F2002/30362A61F2002/30199A61F2002/30326A61F2002/30316A61F2002/30331A61F2002/2892A61F2002/30016A61F2002/30324A61F2002/30364A61F2002/30604A61F2002/30624A61F2002/30329A61F2002/30385A61F2002/30354A61F2/3836
Inventor 理查德·D·科米斯泰克
Owner DEPUY (IRELAND) LTD
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