Tibial insert and associated surgical method
First Claim
Patent Images
1. An orthopaedic prosthesis comprising:
- a unicompartmental tibial insert comprising;
a platform including an upper bearing surface and a bottom surface, the bottom surface having a recessed pocket defined therein, anda substantially U-shaped keel extending downwardly from the platform,wherein the substantially U-shaped keel includes (i) a first downwardly-extending surface extending perpendicularly from the bottom surface of the platform to a distal-most point, the first downwardly-extending surface having a first channel defined therein extending in the anterior-posterior direction and a pair of auxiliary channels defined therein extending perpendicular to the first channel, each of the auxiliary channels being in fluid communication with the first channel and the recessed pocket such that the recessed pocket is fluidly coupled to the first channel, (ii) a second downwardly-extending surface extending perpendicularly from the bottom surface of the platform to a distal-most point, and (iii) a rounded, distal surface defining an arc of about 180-degrees connecting the first and second downwardly-extending surfaces, the arc defining a continuous radius extending from the distal-most point of the first downwardly-extending surface to the distal-most point of the second downwardly-extending surface.
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Abstract
A tibial insert includes a platform defining an upper bearing surface and a bottom surface. A keel of the tibial insert is coupled to the bottom surface of the platform. A surgical method for knee anthroplasty is also disclosed.
72 Citations
16 Claims
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1. An orthopaedic prosthesis comprising:
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a unicompartmental tibial insert comprising; a platform including an upper bearing surface and a bottom surface, the bottom surface having a recessed pocket defined therein, and a substantially U-shaped keel extending downwardly from the platform, wherein the substantially U-shaped keel includes (i) a first downwardly-extending surface extending perpendicularly from the bottom surface of the platform to a distal-most point, the first downwardly-extending surface having a first channel defined therein extending in the anterior-posterior direction and a pair of auxiliary channels defined therein extending perpendicular to the first channel, each of the auxiliary channels being in fluid communication with the first channel and the recessed pocket such that the recessed pocket is fluidly coupled to the first channel, (ii) a second downwardly-extending surface extending perpendicularly from the bottom surface of the platform to a distal-most point, and (iii) a rounded, distal surface defining an arc of about 180-degrees connecting the first and second downwardly-extending surfaces, the arc defining a continuous radius extending from the distal-most point of the first downwardly-extending surface to the distal-most point of the second downwardly-extending surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A tibial insert comprising:
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an upper bearing surface, a bottom surface positioned below the upper bearing surface, a bottom wall positioned between the upper bearing surface and the bottom surface, the bottom wall having a first opening defined therein, an inner wall extending upwardly from the bottom surface to the bottom wall, an outboard surface extending from the upper bearing surface to the bottom surface, the outboard surface having a second opening defined therein positioned above the inner wall, and a keel positioned below the bottom surface, the keel extending in an anterior-to-posterior direction and having a first channel defined therein extending in the anterior-posterior direction and a second channel defined therein in fluid communication with the first channel, wherein (i) the inner wall and the bottom wall cooperate to define a recessed pocket that is in fluid communication with the second channel such that the recessed pocket is fluidly coupled to the first channel, (ii) a first passageway extends from the second opening defined in the outboard surface in the anterior-posterior direction, and (iii) a second passageway extends from the first opening defined in the bottom wall to the first passageway to fluidly couple the recessed pocket with the second opening defined in the outboard surface. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A unicompartmental tibial insert comprising:
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a platform including an upper bearing surface and a bottom surface, the bottom surface having a recessed pocket defined therein, and a substantially U-shaped keel extending downwardly from the platform, the substantially U-shaped keel including (i) a first downwardly-extending surface, (ii) a second downwardly-extending surface opposite to and substantially parallel with the first downwardly-extending surface, and (iii) a rounded, distal surface defining a continuous radius, the rounded, distal surface having a first end directly connected to a distal-most point of the first downwardly-extending surface and a second end directly connected to a distal-most point of the second downwardly-extending surface of the substantially U-shaped keel, wherein the rounded, distal surface of the substantially U-shaped keel longitudinally extending in an anterior-to-posterior direction parallel to the bottom surface of the platform and the continuous radius defining an arc of about 180-degrees.
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Specification