Sacroiliac Joint Stabilization And Fixation Devices And Related Methods

Abstract

An anchor device for use in sacroiliac joint stabilization comprises a housing having a bore, one or more apertures, and a threaded outer surface, one or more engagement members at least partially disposed in the housing, where at least one of the one or more engagement members is movable between a retracted position and an extended position such that, when the at least one of the one or more engagement members is in the extended position, the at least one of the one or more engagement members extends through at least one of the one or more apertures, and where, when the at least one of the one or more engagement members is in the extended position, the at least one of the one or more engagement members is configured to engage a cortical wall of a sacrum bone.

What is claimed is: 
     
         1 . An anchor device for use in sacroiliac joint stabilization, comprising:
 a housing having:
 a bore; and 
 one or more apertures; 
   one or more engagement members at least partially disposed in the housing, where at least one of the one or more engagement members is movable between a retracted position and an extended position such that, when the at least one of the one or more engagement members is in the extended position, the at least one of the one or more engagement members extends through at least one of the one or more apertures;   wherein, the at least one of the one or more engagement members is axially movable relative to the housing along a longitudinal axis thereof; and   wherein, when the at least one of the one or more engagement members is in the extended position, the at least one of the one or more engagement members is configured to be disposed within the sacrum bone.   
     
     
         2 . The device of  claim 1 , comprising an actuator movable in the bore of the housing and configured to effectuate movement of the at least one of the one or more engagement members between the retracted position and the extended position. 
     
     
         3 . The device of  claim 2 , where the actuator is configured to engage the at least one of the one or more engagement members in order to effectuate movement of the at least one of the one or more engagement members between the retracted position and the extended position. 
     
     
         4 . The device of  claim 3 , where the actuator is configured to mate with a threaded inner surface of the housing. 
     
     
         5 . The device of  claim 3 , where the actuator is configured to engage a tapered surface of the at least one of the one or more engagement members to effectuate movement between the retracted position and the extended position. 
     
     
         6 . The device of  claim 1 , wherein the housing has a threaded outer surface. 
     
     
         7 . The device of  claim 6 , where the housing comprises:
 a first anchor having the threaded outer surface and a threaded inner surface; and   a second anchor movable relative to the first anchor, where the second anchor includes a threaded outer surface configured to mate with the threaded inner surface of the first anchor, where a pitch of the threaded inner surface of the first anchor is greater than a pitch of the threaded outer surface of the first anchor.   
     
     
         8 . The device of  claim 7 , comprising
 a carriage assembly disposable in the second anchor, the carriage assembly comprising:
 the one or more engagement members, and 
 an actuator configured to effectuate movement of the at least one of the one or more engagement members between the retracted position and the extended position. 
   
     
     
         9 . The device of  claim 7 , where the pitch of the threaded inner surface the first anchor is greater than the pitch of the threaded outer surface of the first anchor. 
     
     
         10 . The device of  claim 6 , comprising a washer movable over the threaded outer surface of the housing toward the one or more engagement members. 
     
     
         11 . The device of  claim 10 , comprising a locking nut movable along the threaded outer surface of the housing, where the locking nut is configured to urge the washer toward the one or more engagement members. 
     
     
         12 . The device of  claim 1 , where the at least one of the one or more engagement members is rotatable via a hinge between the retracted position and the extended position. 
     
     
         13 . The device of  claim 1 , wherein the at least one of the one or more engagement members are axially movable in the retracted position or the extended position.