Patent ID: 7344537
Filing Date: 2008-03-18
Classification: A61B

Abstract:
1. A mounting construct for a bone fixation rod system comprising: a bottom plate having a lower surface for engaging a vertebral body and an upper surface having at least one recess therein for accommodating a bottom surface of a rod, said bottom plate further comprising at least one hole through said lower surface and said upper surface for receiving a bone fixation anchor, and a first projection having a proximal end connected to said upper surface of said bottom plate and a distal end extending outwardly therefrom having a first non-threaded engagement structure thereon; a top plate having an upper surface and a lower surface having at least one recess therein for accommodating an upper surface of said rod, said top plate further comprising an opening through said upper surface and said lower surface for receiving said first projection; a cap rotatable from an unlocked position to a locked position having an opening therethrough and having a second non-threaded engagement structure disposed about said opening for releasably lockably coupling with said first non-threaded engagement structure of said bottom plate to secure said top plate to said bottom plate; and at least one bone fixation anchor for securing said mounting construct to a bone through said at least one hole; wherein said first non-threaded engagement structure further comprises at least one cam surface disposed about an outer surface of said first projection; and wherein said top plate further comprises two projections depending upwardly from said upper surface for receiving said first projection therebetween.