Implants with transition surfaces and related processes

Details Implants with transition surfaces and related processes Implants with transition surfaces and related processes

A - Human Necessities

61

F

A61F 2/38 (2006.01)

Patent

CA 2662785

Implants, and processes for installing them, which replace the medial condyle and portions of the patellofemoral channel but preferably not portions of the lateral condyle that articulate relative to the tibia. Processes are provided which allow proper location and orientation of an anterior resection and a distal resection on the femur, which make use of a transition point which can be designated on the bone, for navigating proper positioning of such implants. Proper positioning of the implant relative to the femur for insuring a smooth transition between lateral portions of the implant and the lateral condyle is thus reduced to determining proper medial / lateral location of the implant on the anterior and distal resections. Such implants and processes can allow, among other things, for controlled location and orientation of an implant on the bone which saves lateral compartment bone, which eliminates the need to sacrifice the anterior and posterior cruciate ligaments, and which is adapted for minimally invasive surgery with its attendant benefits.

L'invention concerne des implants et des processus de mise en place correspondants, qui permettent de remplacer le condyle médial et des parties du canal fémoro-patellaire mais de préférence pas les parties du condyle latéral qui s'articulent à proximité du tibia. L'invention concerne des processus qui permettent de placer et d'orienter avec précision une résection antérieure et une résection distale du fémur et qui utilisent un point de transition pouvant être désigné sur l'os afin d'effectuer un positionnement précis de ces implants. De cette manière, le positionnement précis de l'implant par rapport au fémur visant a assurer une transition en douceur entre la parties latérales de l'implant et le condyle latéral se réduit à la détermination d'une position médiale / latérale d'un implant de l'os qui permet de préserver l'os de compartiment latéral, ce qui rend superflu le sacrifice des ligaments croisés antérieur et postérieur; il est donc conçu pour la chirurgie à invasivité minimale avec les avantages qu'elle procure.

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