Distal femoral jig assembly
AssigneeDepuy Ireland Unlimited Company
InventorsStuart Grant, Xiaohui Dong
Life of this patent
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Abstract
A cutting apparatus for resecting a distal face of a femur prior to implanting a femoral component of a total knee prosthesis, comprises an elongate rod adapted for inserting into an intramedullary canal of the femur, a distal femoral cutting block, and a distal femoral jig assembly. The jig assembly can position the distal femoral cutting block on either left leg or right leg. It includes a distal femoral jig having at least one passage for slidingly receiving the rod with a preset valgus angle and a distal end face being adapted for abutting against on the distal face of the femur of either left leg or right leg dependent on its two flip orientations.
Claims15
A distal femoral jig assembly used with a cutting apparatus for resecting a distal face of a femur prior to implanting a femoral component of a total knee prosthesis, the cutting apparatus comprising:
- (i) a rod adapted for inserting into an intramedullary canal of the femur, and
- (ii) a distal femoral cutting block configured for guiding resection of the distal face of the femur,
- in which the distal femoral jig assembly is capable of positioning the distal femoral cutting block on either a left leg or a right leg and comprises a distal femoral jig and a distal femoral jig outrigger having at least one vertical leg, the distal femoral jig comprising:
- (a) a positioning block having a distal end face which is adapted for abutting against the distal face of the femur, and at least one vertical through hole extending through it from an upper surface to an opposite lower surface thereof, the through hole being configured to receive the vertical leg on the outrigger, and
- (b) a guiding bar which is formed integrally with the positioning block and extends proximally from the positioning block, the guiding bar extending along a longitudinal axis of the jig which extends perpendicular to the distal end face of the positioning block,
- in which first and second passages extend through the guiding bar and the positioning block, in a convergent manner in a direction towards the patient's femur when the jig is in use, the first and second passages each being configured for slidingly receiving the rod with respective first and second preset valgus angles, and
- in which the distal end face of the positioning block can abut against on the distal face of the femur of either the left leg or the right leg dependent on two flip orientations in which, in a first flip orientation the rod can be inserted in a selected one of the first and second passages having an appropriate preset valgus angle for one of the left and right legs, and in a second flip orientation after the distal femoral jig being flipped over approximately 180° about a jig longitudinal axis the rod can be inserted in a selected one of the first and second passages having the appropriate preset valgus angle for the other one of the left and right legs.
Dependencies are inferred from the claim text.