Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1997-05-20
1999-06-08
Isabella, David J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
606 86, A61F 232, A61F 228
Patent
active
059101725
ABSTRACT:
Each tamp in a sequence has a collar at a progressively increased distance from the bottom of a cavity in a femur relative to other tamps in the sequence. The collar on each tamp has progressively increased dimensions relative to collars on other tamps to provide a snug fit of such collar against inner walls defining the femur cavity. Bone particles are also disposed in such cavity. After the insertion of each tamp into the cavity, such tamp is driven into the cavity to pack the bone fragments in the cavity against one another, the collar and the femur inner walls. Such tamp is then removed from the cavity and the next tamp in the sequence is inserted, and driven, into the cavity. The distance for driving each tamp into the cavity may be defined by a coincidence between a marking on such tamp and the top of the femur. When the last tamp in the sequence is removed from the cavity, the cavity is filled with a binder which permeates the space between the bone particles through only a limited distance because of the tight packing of the bone particles. The prosthesis may then be properly positioned in the femur cavity. The prosthesis is slightly narrower than the last tamp so that a thin layer of the binder is formed between the prosthesis and the bone fragments. The binder hardens against the prosthesis and the bone particles to retain the prosthesis fixedly in the cavity.
REFERENCES:
patent: 5683395 (1997-11-01), Mikhail
patent: 5697932 (1997-12-01), Smith et al.
patent: 5718707 (1998-02-01), Mikhail
patent: 5755720 (1998-05-01), Mikhail
patent: 5788704 (1998-08-01), Timperley
Isabella David J.
Johnson & Johnson
Roston Ellsworth R.
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