Patent ID: 9198692
Filing Date: 2015-12-01
Classification: A61B

Abstract:
1. A spinal fixation anchor, comprising: an implantable portion including a bone anchor and a rod housing having a first arm separated from a second arm by a rod channel; and an extension guide integrally but breakably connected to the rod housing, the extension guide having an outer surface, an inner surface, and a material thickness defined between the outer surface and inner surface, the extension guide including a first extension arm having a distal end and a proximal end and a second extension arm having a distal end and a proximal end, the distal end of the first extension arm being connected to the first arm of the rod housing by a first breakable joint, the distal end of the second extension arm being connected to the second arm of the rod housing by a second breakable joint, the first breakable joint comprising a horizontal groove of reduced material thickness positioned between the first arm and the first extension arm, the second breakable joint comprising a horizontal groove of reduced material thickness positioned between the second arm and the second extension arm, the proximal end of the first extension arm being integrally but breakably connected to the proximal end of the second extension arm by third and fourth breakable joints, the first extension arm being separated from the second extension arm by a guide channel aligned with the rod channel and extending distally from the third and fourth breakable joints through the extension guide distal end, the guide channel having a first width dimensioned to permit passage of a rod therethrough, the third and fourth breakable joints each comprising a vertical groove of reduced material thickness positioned between the first and second extension arms, the vertical grooves of the third and fourth breakable joints each having a second width that is less than the first width of the guide channel.