Method and apparatus for joint reconstruction
OwnerKhosrow R. Sehatinventor
Life of this patent
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Abstract
Apparatus and methods for replacing a knee joint with an implant prosthesis are described. The method includes distracting the knee, locating the pre-diseased joint line of the knee and referencing cuts to the femur and tibia in the coronal plane relative to the joint line. The method further comprises determining the posterior slope of a cut to the tibia in the sagittal plane such that the gaps between the tibia and femur in extension and flexion are substantially equal. Apparatus for use in the method is described, including a distractor for distracting the joint, a joint level finder for finding the pre-diseased joint line and a flexion gap optimisation device.
Claims15
An apparatus for determining the angle of a cut to be made to a tibia in the sagittal plane, the apparatus comprising:
- a first chassis having a first pair of channels for receiving pins in a tibia;
- a second chassis having a second pair of channels for receiving pins to be placed in the tibia,
- wherein the second chassis is pivotable about a pivot point so as to change the angle at which the second pair of channels guides pins into the tibia relative to the angle of the pins through the first pair of channels;
- a bar having a first end attached to the first chassis, and a second end, wherein in use the bar extends substantially parallel to a longitudinal axis of the tibia;
- and
- a distal femoral surface block including a flat surface for abutting a distal femur and a stylus for abutting an anterior femur, wherein the distal femoral surface block supported by the second end of the bar.
Dependencies are inferred from the claim text.