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US 10,517,615 B2Granted
Device and method for installing femoral prosthetic knee joint
OwnerIgnace Ghijselingsinventor
Life of this patent
Estimating the term…
Abstract
Devices and method for performing replacement prosthetic knee surgery are disclosed in which a spacing means is introduced between the femur (1) and tibia (2) while the patella (9) is in place. The spacing means separates the femur (1) from the tibia (2) by an amount essentially equal to or greater than the required flexion gap (4). An alignment device (26) is used for performing femoral bone cuts, which device attaches temporarily to a fitted tibial plate.
Claims30
A kit comprising:
- an alignment device for aligning a block for cutting the posterior femoral condyles during prosthetic knee surgery, which device comprises:
- (i) a securing protrusion for temporary attachment to a fitted tibial plate, which securing protrusion fixes the position and orientation of the alignment device relative to the tibial plate,
- (ii) a finger-like coupling protrusion with a flat surface for temporary attachment to a posterior femoral cutting block, which finger-like coupling protrusion with a flat surface prevents rotation of the posterior femoral cutting block, around a z-axis, where the z-axis is parallel to an intermedular femoral axis, and
- (iii) a linear actuator joining (i) and (ii), which linear actuator is configured to adjust the distance between (i) and (ii) along a y-axis, where the y-axis is defined as being parallel to an intermedular tibial axis, and an x-axis is defined as being perpendicular to the y-axis and the z-axis,
- and at least one cutting block selected from the group consisting of:
- a posterior femoral cutting block comprising one or more first blade guides, further comprising a receiving slot configured to receive the finger-like coupling protrusion attached to the alignment device,
- an anterior femoral cutting block disposed with a second blade guide, said anterior femoral cutting block provided with an attachment protrusion, which attachment protrusion is configured to align a plane of the second blade guide with an x-z plane intersecting the x-axis and the z-axis, and
- a distal femoral cutting block disposed with a third blade guide, said distal femoral cutting block provided with an attachment protrusion, which attachment protrusion is configured to align a plane of the third blade guide with an x-y plane intersecting the x-axis and the y-axis,
- wherein one of the cutting blocks selected is the posterior femoral cutting block.
6 more elements
A kit comprising:
- an alignment device for aligning a block for cutting the posterior femoral condyles during prosthetic knee surgery, which device comprises:
- (i) a securing protrusion for temporary attachment to a fitted tibial plate, which securing protrusion fixes the position and orientation of the alignment device relative to the tibial plate,
- (ii) a finger-like coupling protrusion with a flat surface for temporary attachment to a posterior femoral cutting block, which finger-like coupling protrusion with a flat surface prevents rotation of the posterior femoral cutting block, around a z-axis, where the z-axis is parallel to an intermedular femoral axis, and
- (iii) a linear actuator joining (i) and (ii), which linear actuator is configured to adjust the distance between (i) and (ii) along a y-axis, where the y-axis is defined as being parallel to an intermedular tibial axis, and an x-axis is defined as being perpendicular to the y-axis and the z-axis,
- and at least one cutting block selected from the group consisting of:
- a posterior femoral cutting block comprising one or more first blade guides, further comprising a receiving slot configured to receive the finger-like coupling protrusion attached to the alignment device,
- an anterior femoral cutting block disposed with a second blade guide, said anterior femoral cutting block provided with an attachment protrusion, which attachment protrusion is configured to align a plane of the second blade guide with an x-z plane intersecting the x-axis and the z-axis, and
- a distal femoral cutting block disposed with a third blade guide, said distal femoral cutting block provided with an attachment protrusion, which attachment protrusion is configured to align a plane of the third blade guide with an x-y plane intersecting the x-axis and the y-axis
- wherein said linear actuator is connected to the finger-like coupling protrusion by way of a cylindrical hole that permits rotation of the posterior femoral cutting block around the y-axis.
6 more elements
Dependencies are inferred from the claim text.