A method of arthroplasty on a knee joint and apparatus for...

A - Human Necessities – 61 – B

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A61B 17/14 (2006.01) A61B 17/15 (2006.01) A61B 17/16 (2006.01) A61B 17/17 (2006.01) A61B 17/56 (2006.01) A61B 17/90 (2006.01) A61F 2/38 (2006.01)

Patent

CA 2402324

A method of, and apparatus for, arthroplasty of a knee joint comprising obtaining a desired spacing of the femur (6) from the tibia (14) by inserting a spacer (28) into the knee joint between the femur (6) and the tibia (14). The spacer (28) is used as a reference for securing a guide jig in position about the knee joint for guiding resection of one or both of the femur (6) and tibia (14) for fitting of tibial and/or femoral prostheses. A method of resecting the femur while moving the tibia through an arc of motion to remove bone to the desired depth, a method of determining the position of the guide jig, the guide jig, an alignment device and the spacer are also described.

La présente invention concerne un procédé d'arthroplastie d'une articulation du genou et un appareil à cet effet. L'intervention vise à réaliser un écartement spécifique entre le fémur (6) et le tibia (14) par l'insertion d'une cale d'espacement (28) dans l'articulation entre le fémur (6) et le tibia (14). Cette cale d'espacement (28) fournit une référence pour la fixation en position d'un gabarit guide autour de l'articulation du genou de façon à guider la résection de l'un au moins du fémur (6) et du tibia (14) dans le cadre de l'adaptation de prothèses tibiales et/ou fémorales. L'invention concerne également, d'une part un procédé de résection du fémur en faisant décrire au tibia un mouvement en arc de façon à dégager l'os jusqu'à la profondeur voulue, d'autre part un procédé de calcul de la position du gabarit guide, mais aussi le gabarit guide lui-même, et enfin la cale d'espacement.

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