Patent ID: 11883081
Assignee: RTG SCIENTIFIC, LLC
Field: Medical technology (Instruments)
Classification: CPC A  B | IPC A  B

Claim 0:
1. An implantable bone anchor comprising:
a shaft comprising:
a minor diameter;
a proximal end;
a distal end; and
a longitudinal axis;

a first helical thread disposed about the shaft along the longitudinal axis between the proximal and distal ends of the shaft, the first helical thread comprising:
a first undercut surface;
a second undercut surface;
a third undercut surface; and
a fourth open surface; and

a second helical thread disposed about the shaft adjacent the first helical thread, the second helical thread comprising:
a fifth undercut surface;
a sixth undercut surface;
a seventh undercut surface; and
an eighth open surface;

wherein, when the implantable bone anchor is viewed in section along a plane containing the longitudinal axis of the shaft:
the first undercut surface, the third undercut surface, the sixth undercut surface, and the eighth open surface are angled towards the distal end of the shaft as they extend away from the longitudinal axis;
the second undercut surface, the fourth open surface, the fifth undercut surface, and the seventh undercut surface are angled towards the proximal end of the shaft as they extend away from the longitudinal axis;
the first undercut surface and the second undercut surface form a first concave undercut surface of the first helical thread that is open toward the proximal end of the shaft and extends from the minor diameter of the shaft to a first crest of the first helical thread; and
the fifth undercut surface and the sixth undercut surface form a second concave undercut surface of the second helical thread that is open toward the distal end of the shaft and extends from the minor diameter of the shaft to a second crest of the second helical thread.