EP 1474053 A1 20041110 - POSTERIOR POLYAXIAL SYSTEM FOR THE SPINE
Title (en)
POSTERIOR POLYAXIAL SYSTEM FOR THE SPINE
Title (de)
POSTERIORES POLYAXIALES SYSTEM FÜR DIE WIRBELSÄULE
Title (fr)
SYSTEME POLYAXIAL POSTERIEUR POUR LA COLONNE VERTEBRALE
Publication
Application
Priority
- US 0304040 W 20030211
- US 35699602 P 20020213
- US 36014503 A 20030207
- US 36119503 A 20030207
Abstract (en)
[origin: WO03068088A1] The invention provides a rod assembly for implantation into the spine which includes a bone anchor assembly providing two points of angulation for the connection between the point of fixation and the rod. Further, the distance of offset between the point of fixation and the rod can be varied. The invention uses a bone screw having a pronged cage with a recess that accommodates the head of a post member. The cage can be tightened around the head by the camming surfaces of a locking cap that is drawn down around the compressible cage as the head is screwed upward in the recess by the engagement of the threads of the post by a locking nut. Further, the locking cap has a slotted bushing that is positionable in the elongated slot of a rod connector member. The locking nut includes an external taper that expands the bushing outward to lock it into position in the slot. In a further embodiment, the head has an internal hollow that receives a spindle journaled in a cavity in the recess to limit the amount of play in the assembly prior to tightening. In a further embodiment, the connection between bone anchors is provided by a plate that has locking caps pre-assembled into the plate.
IPC 1-7
IPC 8 full level
A61B 17/70 (2006.01)
CPC (source: EP)
A61B 17/7007 (2013.01); A61B 17/701 (2013.01); A61B 17/7035 (2013.01); A61B 17/7041 (2013.01); A61B 17/7037 (2013.01)
Citation (search report)
See references of WO 03068088A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
WO 03068088 A1 20030821; AU 2003210964 A1 20030904; EP 1474053 A1 20041110
DOCDB simple family (application)
US 0304040 W 20030211; AU 2003210964 A 20030211; EP 03739733 A 20030211