Bone screw system and devices providing sacroiliac stabilization

Abstract

A related bone screw system may include a threaded base configured to be screwed into a bone, and a first head carried by the threaded base and defining a first channel therein. The first channel may be configured to receive a first support rod, and the first head may have first internal threads within the first channel. The bone screw device may further include a second head comprising a threaded base configured to be threadably coupled with the first inner threads to secure the first support rod within the first channel of the first screw head, and an articulating head coupled to the threaded base and defining a second channel therein configured to receive a second support rod. The articulating head may be configured for polyaxial movement relative to the threaded base.

That which is claimed is: 
     
         1 . A bone screw system comprising:
 a first threaded base configured to be screwed into a bone;   a first head carried by said first threaded base and defining a first channel therein, the first channel configured to receive a first support rod, and said first head having first internal threads within the first channel; and   a second head comprising
 a second threaded base configured to be threadably coupled with the first inner threads to secure the first support rod within the first channel of said first screw head, and 
 an articulating head coupled to said second threaded base and defining a second channel therein configured to receive a second support rod, said articulating head configured for polyaxial movement relative to said second threaded base. 
   
     
     
         2 . The bone screw system of  claim 1  wherein said articulating head has second internal threads within the second channel; and further comprising a set screw configured to be threadably coupled with the second internal threads to secure the second support rod within the second channel. 
     
     
         3 . The bone screw system of  claim 2  wherein said articulating head further has external threads on an outer surface thereof which are reversed with respect to the second internal threads. 
     
     
         4 . The bone screw system of  claim 1  wherein said first head is configured for polyaxial movement with respect to said first threaded base. 
     
     
         5 . The bone screw system of  claim 1  where the first support rod comprises a spinal stabilization rod, and wherein the second support rod comprises an iliac stabilization rod. 
     
     
         6 . A bone screw device comprising:
 a base having a first channel therein configured to receive a first support rod; and   an articulating head coupled to said base and defining a second channel therein configured to receive a second support rod, said articulating head configured for polyaxial movement relative to said base.   
     
     
         7 . The bone screw device of  claim 6  wherein said articulating head has internal threads within the channel; and further comprising a set screw configured to be threadably coupled with the internal threads to secure the second support rod within the second channel. 
     
     
         8 . The bone screw device of  claim 7  wherein said articulating head further has external threads on an outer surface thereof which are reversed with respect to the internal threads. 
     
     
         9 . The bone screw device of  claim 6  wherein said base comprises a sleeve configured to be carried on the first support rod. 
     
     
         10 . The bone screw device of  claim 9  further comprising at least one set screw configured to secure said sleeve to the first support rod. 
     
     
         11 . The bone screw device of  claim 6  wherein said base comprises a bracket having a C-shaped cross-section and configured to be carried on the first support rod. 
     
     
         12 . The bone screw device of  claim 6  where the first support rod comprises a spinal stabilization rod, and wherein the second support rod comprises an iliac stabilization rod.