SPINAL IMPLANT, DRIVER TOOL AND NUT GUIDE

摘要

PURPOSE: Spinal implants for osteosynthesis devices are provided. More particularly, a spinal implant, a driver tool specifically suited for the spinal implant, and a nut guide suited for the spinal implant are provided. CONSTITUTION: The spinal implant for an osteosynthesis device having a vertebral connecting rod for interconnecting adjacent vertebral bodies, comprises: an implant body including a head section having a threaded portion and a rod retaining recess opening outward for retaining the connecting rod therein, and an anchoring screw section longitudinally extending from the head section and adapted to be screwed into the vertebral body; a nut member screwed to the threaded portion of the head section to maintain the connecting rod in place; and rod movement stabilizing means directly located in at least one of the rod retaining recess and the nut member for allowing pivotal movement of the connecting rod in the retaining recess, thereby preserving mobility to the connecting rod.