Method and apparatus for antibiotic knee prothesis
First Claim
1. A method of treatment of an infected knee joint requiring a knee joint prothesis between a femur and a tibia which comprises removing an implanted knee joint prothesis and infected tissue therearound, custom molding a femoral prothesis having a first bearing means disposed in a first removable mold, introducing a settable material into said mold, said settable material containing a selected antibiotic that may be elutriated from said femoral prothesis at a desired rate to combat an infection, at least partially setting said settable material, contacting and connecting said femoral prothesis to a distal end of said femur and removing said first mold, custom molding a tibial prothesis having a mating bearing means disposed in a second removable mold, said bearing means adapted to cooperate and form an articulated joint with said first bearing means introducing said settable material containing said selective antibiotic into said second mold, setting said material in said second mold to form said tibial prothesis, removing said tibial prothesis from said second mold, contacting and connecting said tibial prothesis to a proximal end of said tibia in a position for said first bearing means and said mating bearing means to form an articulated knee joint.
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Accused Products
Abstract
A method and equipment for producing an antibiotic loaded knee prothesis by custom molding a femoral prothesis in a removable mold from a settable material containing a selected antibiotic, applying the molded prothesis to the distal end of the femur, completing the set of the material to anchor the prothesis to the femur and removing the removable mold. Next a tibial prothesis is custom molded in a second removable mold from a settable material containing a selected antibiotic, the material set and the so formed tibial prothesis is removed from the second mold and is then connected to the proximal end of the tibia in a position to form an articulating joint with the previously molded and applied femoral prothesis.
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Citations
12 Claims
- 1. A method of treatment of an infected knee joint requiring a knee joint prothesis between a femur and a tibia which comprises removing an implanted knee joint prothesis and infected tissue therearound, custom molding a femoral prothesis having a first bearing means disposed in a first removable mold, introducing a settable material into said mold, said settable material containing a selected antibiotic that may be elutriated from said femoral prothesis at a desired rate to combat an infection, at least partially setting said settable material, contacting and connecting said femoral prothesis to a distal end of said femur and removing said first mold, custom molding a tibial prothesis having a mating bearing means disposed in a second removable mold, said bearing means adapted to cooperate and form an articulated joint with said first bearing means introducing said settable material containing said selective antibiotic into said second mold, setting said material in said second mold to form said tibial prothesis, removing said tibial prothesis from said second mold, contacting and connecting said tibial prothesis to a proximal end of said tibia in a position for said first bearing means and said mating bearing means to form an articulated knee joint.
- 11. A set of molds to produce mating femur and tibial prothesis to form a temporary knee joint that dispenses antibiotics to cure infection comprising a first mold having a first interior mold face shaped to form a knee joint forming end of a femur, said first mold including a first mold surface to form a first bearing means in the form of a convex runner on a femoral prothesis formed therein, said first mold surface forming said first bearing comprising a first removable insert means mounted in said mold, said first insert means having the required shape to form said first bearing means, means for temporarily positioning said first insert means in said first mold to permit said first insert means to separate from said first mold with said femoral prothesis on separation of said femur prosthesis from said first mold, a second mold, said second mold having a second interior molding face shaped to form a knee joint forming end of a tibia, said second molding face including a second mold surface to form a mating bearing means in a tibial prothesis formed therein, said mating bearing means being shaped to cooperate with said first bearing means to form an articulating knee joint.
Specification