US 6,981,974 B2
Cannulated internally threaded bone screw with aperatured insert
J. Lee Berger, 895 Mohawk Rd., Franklin Lakes, N.J. 07417 (US)
Filed on Feb. 04, 2003, as Appl. No. 10/357,390.
Application 10/357390 is a continuation in part of application No. 10/154923, filed on May 28, 2002.
Application 10/154923 is a continuation of application No. 09/130374, filed on Aug. 07, 1998, granted, now 6,436,100.
Prior Publication US 2003/0120277 A1, Jun. 26, 2003
Int. Cl. A61B 17/86 (2006.01)
U.S. Cl. 606—73 20 Claims
OG exemplary drawing
 
1. A cannulated torque receiving bone screw assembly comprising:
a screw with an elongated cylindrical shank defining an inner throughgoing cylindrical bore and having a proximal end, a head integrally formed at the proximal end, a distal end, and an outer surface, an engagement structure defined by said head is shaped to receive and rotatably engage a driver having a shape complimentary to the shape of the engagement structure; an external thread is formed on said shank outer surface and extends along a section of said shank. the rest of the outer surface being unthreaded and an internal thread is formed on a surface defining an inner cylindrical bore axially aligned with said shank and a threaded anchor bolt is mounted to said screw adjacent said screw head, said anchor bolt defining at least one throughgoing bore therein transverse the axis of said inner cylindrical bore.