Knee arthroplasty prosthesis and method
4 Assignments
0 Petitions
Accused Products
Abstract
A knee arthroplasty prosthesis includes a femoral component having multiple pieces with engagement means provided for engaging various pieces of the femoral component to one another following their insertion in the incised area of the femur. A tibial component includes multiple pieces designed for assembly following positioning in the incision. The tibial component includes a Morse taper cavity on one piece of the tibial component and a Morse taper extension on another member of the component for receipt therein.
303 Citations
29 Claims
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1. (canceled)
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2. A femoral component for knee arthroplasty in a knee having a natural patella or a prosthetic patella comprising;
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(a) a first piece having a patellar femoral flange portion including an articulating surface for engagement by said patella said first piece extending from an anterior end toward a posterior end and having one or more engagement surfaces defining one side of a joint;
(b) a second piece defining at least one condylar portion and having an articulating surface, said second piece extending from said posterior end toward said anterior end and having one or more abutment surfaces cooperating with said engagement surfaces to define said joint;
(c) a third piece defining a second condylar portion extending from said posterior end toward said anterior end and having at least one abutment surface cooperating with said engagement surface to define a second joint;
(d) a fastener for securing said first piece and said second piece together; and
(e) a second fastener for securing said third piece to said first piece.
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3. A femoral component for knee arthroplasty in a knee having a natural patella or a prosthetic patella comprising
(a) a first piece having a patellar femoral flange portion including an articulating surface for engagement by said patella, said first piece extending from an anterior end toward a posterior end and having one or more engagement surfaces defining one side of a joint; -
(b) a second piece defining first and second condylar portions and having an articulating surface, said second piece extending from said posterior end toward said anterior end and having one or more abutment surfaces cooperating with said engagement surfaces to define said joint;
(c) a fastener for securing said first piece and said second piece together; and
(d ) at least one laterally extending cross member supporting said first condylar portion to said second condylar portion. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. (canceled)
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11. (canceled)
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12. A femoral component for knee arthroplasty in a knee having a natural patella or a prosthetic patella comprising;
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(a) a first piece having a patellar femoral flange portion including an articulating surface for engagement by said patella, said first piece extending from an anterior end toward a posterior end and having one or more engagement surfaces defining one side of a joint;
(b) a second piece defining first and second condylar portions each having an articulating surface, said second piece extending from said posterior end toward said anterior end and having one or more abutment surfaces cooperating with said engagement surfaces to define said joint;
(c) a fastener for securing said first piece and said second piece together; and
(d) a connecting section having an articulating surface extending smoothly from both of said first and second condylar portions articulating surfaces to said one or more abutment surfaces. - View Dependent Claims (13, 14, 15, 16, 17)
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18-20. -20. (canceled)
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21. A femoral knee prosthesis component for use with a tibial component having an articulating surface comprising:
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(a) a condylar piece having (i) a superior surface contoured to engage a prepared surface at the distal end of a femur, (ii) an opposing articulating surface contoured for sliding engagement with said tibial component articulating surface and extending from (I) a posterior end to (II) an abutment end;
(b) a second piece having (i) a superior surface contoured to engage a prepared surface at the distal end of a femur (ii) an opposing articulating surface contoured for sliding engagement by a natural of prosthetic patella and extending from (I) an anterior end to (II) an engagement end contoured for mating engagement with said condylar piece abutment end; and
(c) engagement means for securing said condylar piece to said second piece, said engagement means including (a) apertures in said condylar piece and said second piece, and (b) a fastening member extending into apertures of both said condylar piece and said second piece.
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22. A femoral knee prosthesis component for use with a tibial component having an articulating surface comprising:
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(a) a condylar piece having (i) a superior surface contoured to engage a prepared surface at the distal end of a femur, (ii) an opposing articulating surface contoured for sliding engagement with said tibial component articulating surface and extending from (I) a posterior end to (II) an abutment end;
(b) a second piece having (i) a superior surface contoured to engage a prepared surface at the distal end of a femur (ii) an opposing articulating surface contoured for sliding engagement by a natural of prosthetic patella and extending from (I) an anterior end to (II) an engagement end contoured for mating engagement with said condylar piece abutment end; and
(c) engagement means for securing said condylar piece to said second piece, said condylar piece including first and second spaced apart condylar portions joined together by one or more cross members and said second piece is a patellar flange member. - View Dependent Claims (23, 24, 25, 26)
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29-62. -62. (canceled)
Specification