Total Knee Prosthesis and Method for Total Knee Arthroplasty
First Claim
1. A prosthetic knee implant, comprisinga. a femoral component for fixation to the lower portion of a mammalian femur, said femoral component including a medial and lateral condyle;
- b. a tibial component for fixation to the upper portion of a mammalian tibia, said tibial component including a surface portion adapted to slidably engage said femoral component upon rotation of said same;
c. wherein said medial and lateral condyles include a bisecting axis around which said tibial component rotates;
d. wherein said medial and lateral condyles define a femoral recess disposed substantially within the center of said femoral component;
e. wherein said tibial component includes a center portion defining an aperture through said tibial component substantially at its center; and
,f. wherein said central femoral recess and said tibial aperture are adapted to receive an anterior cruciate ligament substitute for biasing said mammalian femur and said mammalian tibia together.
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Accused Products
Abstract
A prosthetic knee implant for implantation into a mammal, which accommodates an anterior cruciate ligament substitute to provide stability to the knee implant. The prosthetic knee implant includes a femoral component having a pair of condylar surfaces and a tibial component having a surface portion adapted to slidably engage the femoral component upon rotation of the same. The femoral component further includes a central femoral recess between the condyles providing access to the femur for drilling a channel through which a cruciate ligament substitute may be integrated into the femur. The tibial component further includes a center portion defining an aperture through which the ligament substitute maybe threaded through the tibia and integrated therein, or anchored upon its surface. Also disclosed is a method used to replace the total knee joint in a mammal with the improved prosthetic knee implant of the present invention.
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Citations
27 Claims
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1. A prosthetic knee implant, comprising
a. a femoral component for fixation to the lower portion of a mammalian femur, said femoral component including a medial and lateral condyle; -
b. a tibial component for fixation to the upper portion of a mammalian tibia, said tibial component including a surface portion adapted to slidably engage said femoral component upon rotation of said same; c. wherein said medial and lateral condyles include a bisecting axis around which said tibial component rotates; d. wherein said medial and lateral condyles define a femoral recess disposed substantially within the center of said femoral component; e. wherein said tibial component includes a center portion defining an aperture through said tibial component substantially at its center; and
,f. wherein said central femoral recess and said tibial aperture are adapted to receive an anterior cruciate ligament substitute for biasing said mammalian femur and said mammalian tibia together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A prosthetic knee implant, comprising:
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a. a femoral component means affixed to and replacing a lower portion of a mammalian femur, said femoral component means including a medial and lateral condyle; b. a tibial component means affixed to and replacing an upper portion of a mammalian tibia, said tibial component means including a surface adapted to slidably engage said femoral component means upon rotation of said same; c. wherein said medial and lateral condyles include a bisecting axis around which said tibial component means rotates; d. wherein said medial and lateral condyles define a femoral recess disposed substantially within the center of said femoral component means; e. wherein said tibial component means includes a center portion defining an aperture through said tibial component means substantially at its center; and
,f. wherein said central femoral recess and said aperture in said tibial component means are adapted to receive an anterior cruciate ligament substitute for biasing said mammalian femur and said mammalian tibia together. - View Dependent Claims (18, 19, 20)
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21. A method of total knee joint replacement in a mammal, comprising the steps of:
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a. replacing at least a portion of the lower femur with a prosthetic joint component, said femoral component including a medial and lateral condyle and further including a recess between said condyles defining a recess extending through the center of said femoral component; b. replacing at least a portion of the upper tibia with a prosthetic joint component, said tibial component including a surface portion for receiving the surfaces of said femoral condyles and arranged for slidably supporting said same, said tibial component further including an aperture substantially at its center; c. engaging a drill alignment guide to said femoral component between said femoral condyles and drilling a longitudinal channel through said central femoral recess and into said femur; d. engaging a drill alignment guide to said tibial component and extending said tibial aperture by drilling a longitudinal channel into said tibia and through said tibial aperture; e. threading an anterior cruciate ligament substitute into said femoral channel and into said tibial channel and anchoring a first end of said ligament substitute to bone leaving a free end; f. applying tension to said free end; and
,g. anchoring said free end to bone under tension such that said femur and said tibia are biased together. - View Dependent Claims (22, 23, 24, 25)
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26. A surgical kit for total replacement of a knee, comprising:
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a. a femoral component including a medial and lateral condyle for replacing a lower portion of a mammalian femur, wherein said medial and lateral condyles define a central femoral recess disposed vertically through said femoral component; b. a tibial component including a surface portion adapted to slidably engage said femoral component upon rotation of said same around said femoral component for replacing an upper portion of a mammalian tibia, said tibial component including a center portion defining an aperture through said tibial component substantially at its center; c. at least one drill guide component cooperatively shaped to engage said central femoral recess and said tibial aperture; d. wherein said central femoral recess and said tibial aperture are adapted to receive said drill guide component for stabilizing said same; e. an anterior cruciate ligament substitute component for tensioning a femur against a tibia; and
,f. anchoring means for anchoring said ligament substitute to said femur and said tibia.
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27. A method of consuming the components of a surgical kit during total knee replacement surgery, comprising the steps of:
a. utilizing the components in a surgical kit, said kit comprising; i. a femoral component including a medial and lateral condyle for replacing a lower portion of a mammalian femur, said femoral component including a central recess located between said medial and lateral condyles and defining a slot vertically oriented through said femoral component; ii. a tibial component including a surface portion adapted to slidably engage said femoral component upon rotation of said same around said femoral component for replacing an upper portion of a mammalian tibia, said tibial component including a center portion defining an aperture through said tibial component substantially at its center; iii. at least one drill guide component cooperatively shaped to engage said femoral slot and said tibial aperture; iv. wherein said femoral slot and said tibial aperture are adapted to receive said drill guide component for stabilizing said same; v. an anterior cruciate ligament substitute component for biasing said femur against said tibia; and
,vi. anchoring means for anchoring said ligament substitute to said femur and said tibia.
Specification