Vertebral surface preparation instrument

摘要

An instrument for preparing a surface of a vertebra, such as a vertebral endplate, for receipt of a spinal disc implant. The instrument includes a working tool with implements on one or more surfaces of the working tool that act on the vertebral surface. The instrument includes a rotary-to-linear translation system to cause the working tool to move; for example, from side-to-side, top-to-bottom, or along a path that includes side-to-side and top-to-bottom aspects. The rotary-to-linear translation system may include a drive shaft having a cam pin at a distal end, and a cam follower slot at an anterior end of the working tool.

主权项

1. A surgical instrument for preparing an endplate surface of a vertebra, the instrument comprising:
a working end including a pivot pin and a working tool, said working tool configured for insertion between adjacent vertebras, said working tool having working implements for preparing the vertebral endplate surface, wherein said working tool is arranged at said working end and is associated with said pivot pin for pivoting about said pivot pin, and wherein said working tool includes a cam follower; and a rotatable drive shaft having a proximal end and a distal end, said driveshaft including a cam located at said drive shaft distal end, wherein said cam is operatively associated with said cam follower to pivot said working tool about said pivot pin to prepare the vertebral surface in response to rotation of said rotatable drive shaft relative to said working tool and about a longitudinal axis of said rotatable drive shaft, when the rotatable drive shaft is coupled with the working tool, wherein said cam is a cam pin extending from said distal end of said drive shaft, wherein said cam follower is a cam follower slot provided in said working tool, wherein said cam follower slot is adapted to receive said cam pin, wherein said working tool includes an elongated slot that is counter-bored with respect to said cam follower slot, wherein said elongated slot is adapted to receive said distal end of said drive shaft, wherein said elongated slot and said cam follower slot extend in different directions, and wherein said working tool pivots about said pivot pin relative to said rotatable drive shaft.