Bone cutting device for total knee replacement
First Claim
1. A device for enabling a surgeon to make bone cuts in performing total knee replacement, said device comprising a femoral assembly including an elongated rail adapted to be secured to a femur and substantially parallel thereto, and a support pivotally mounted on said rail for movement about an axis substantially perpendicular thereto and to the femur, a carriage assembly including a carriage housing and a saw carriage slidably guided for linear movement on said carriage housing, said saw carriage adapted to have a saw fixed thereto, said saw having a blade extending substantially parallel to the direction of said linear movement of said carriage, means interconnecting said femoral assembly and said carriage assembly including adjustment means for securing the carriage assembly to said femoral assembly in several adjusted positions including a plurality of first positions where said saw carriage is slidably guided in substantially parallel paths which are substantially parallel to said elongated rail for making an anterior femur cut, a posterior femur cut, and a proximal tibia cut, a plurality of second positions where said saw carriage is slidably guided in substantially parallel paths which are substantially perpendicular to said elongated rail for making a transverse distal femur cut and for scoring the tibia cortex, and a plurality of third positions where said saw carriage is slidably guided in paths forming an acute angle with said elongated rail for making anterior and posterior femoral chamfer cuts.
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Accused Products
Abstract
A device for enabling a surgeon to make bone cuts in performing total knee surgery which includes a femoval assembly adapted to be mounted on a femur, and a carriage assembly connected to the femoval assembly and pivotally adjustable relative thereto about two axes which are transverse to each other and to the femoval axis. The carriage assembly is also adjustable longitudinally of the femoval assembly and includes a saw carriage slidable thereon. The saw carriage supports a powered saw. The parts are adjusted and locked in several sequential positions and the saw carriage and saw moved to make all the knee surgery cuts.
249 Citations
9 Claims
- 1. A device for enabling a surgeon to make bone cuts in performing total knee replacement, said device comprising a femoral assembly including an elongated rail adapted to be secured to a femur and substantially parallel thereto, and a support pivotally mounted on said rail for movement about an axis substantially perpendicular thereto and to the femur, a carriage assembly including a carriage housing and a saw carriage slidably guided for linear movement on said carriage housing, said saw carriage adapted to have a saw fixed thereto, said saw having a blade extending substantially parallel to the direction of said linear movement of said carriage, means interconnecting said femoral assembly and said carriage assembly including adjustment means for securing the carriage assembly to said femoral assembly in several adjusted positions including a plurality of first positions where said saw carriage is slidably guided in substantially parallel paths which are substantially parallel to said elongated rail for making an anterior femur cut, a posterior femur cut, and a proximal tibia cut, a plurality of second positions where said saw carriage is slidably guided in substantially parallel paths which are substantially perpendicular to said elongated rail for making a transverse distal femur cut and for scoring the tibia cortex, and a plurality of third positions where said saw carriage is slidably guided in paths forming an acute angle with said elongated rail for making anterior and posterior femoral chamfer cuts.
Specification