Instrument set for preparation of the seat for the femoral component of a non-cemented hip prosthesis
OwnerPiero Garosiinventor
Life of this patent
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Abstract
The rasps of a first set of metaphyseal rasps are capable of working, in a first stage, the femoral canal in the zone of the metaphysis until the bony part K1, K2 is reached and cut into to form the metaphyseal seat for a femoral component of a hip prosthesis, the rasps having guide stems which act in the zone of the diaphysis. The rasps of a second series of sub-metaphyseal and diaphyseal rasps are capable of working, in a second stage, the femoral canal in the sub-metaphyseal zone and the adjacent zone of the diaphysis, until the bony part K3 is reached and cut into to complete the seat for the femoral component.
Claims3
A set of instruments for preparing the femur canal of a femur for receiving a non-cemented hip prosthesis, comprising:
- an elongated reamer tool having a uniform diameter, said reamer tool being configured for reaming the diaphyseal zone of the femoral canal for preparing the diaphysis to receive a distal portion of said hip prosthesis;
- a series of metaphyseal rasps, each of said metaphyseal rasps being a different size and comprising a proximal cutting portion and a distal guiding means, said proximal cutting portion having bone cutting teeth for cutting only the metaphyseal zone of the femoral canal for preparing the metaphysis to receive a proximal portion of said hip prosthesis, and said distal guiding means having a smooth, non-cutting portion for guiding said metaphyseal rasp in said femoral canal;
- and
- a series of sub-metaphyseal rasps, each of said sub-metaphyseal rasps being a different size and comprising a proximal portion, a medial cutting potion, and a distal guiding means, said proximal portion having a smooth, non-cutting surface, said medial cutting portion having bone cutting teeth for cutting only the sub-metaphyseal zone of the femoral canal for preparing the sub-metaphysis to receive a medial portion of a hip prosthesis, and said distal guiding means having a smooth, non-cutting portion for guiding said sub-metaphyseal rasp in said femoral canal.
Dependencies are inferred from the claim text.