| 主权项 |
1. An intervertebral body fusion implant device configured for being engaged between two adjacent vertebrae, comprising:
an implant device body having an upper bone engaging portion and a lower bone engaging portion, wherein said upper and lower bone engaging portions each include a bone gripping structure configured for limiting relative movement between the implant device body and an engaged one of said adjacent vertebrae and wherein a passage extends through the implant device body between the upper bone engaging portion and the lower bone engaging portion; and a plurality of guide rails extending from each one of said bone engaging portions, wherein the passage extends between a first one and a second one of the guide rails of the upper bone engaging portion and between a first one and a second one of the guide rails of the lower bone engaging portion, wherein at least a portion of each one of the guide rails of each one of said bone engaging portions is exposed above an uppermost portion of the bone gripping structure thereof, and wherein each one of said guide rails is substantially straight and extends parallel with each other one of said guide rails, wherein a bone engaging tip portion of the guide rails at the upper bone engaging portion lie in a first plane, wherein a bone engaging tip portion of the guide rails at the lower bone engaging portion lie in a second plane, wherein the first and second plane extend parallel to each other; and wherein each one of the guide rails has a pointed leading edge and has opposing side faces that converge to form a pointed top edge such that forcible insertion of the intervertebral body fusion implant device between said adjacent vertebrae causes the leading edge of each one of the guide rails to form a guide rail receiving track in a mating endplate surface of a respective engaged one of said adjacent vertebrae as the intervertebral body fusion implant device is being inserted therebetween. |
