Patent ID: 9504504
Filing Date: 2016-11-29
CPC Classification: A61B

Claim Text:
1. A screw for insertion into bone comprising: a shaft having a proximal portion defining a screw head, and a distal portion and an unthreaded portion between the proximal and the distal portions, the shaft defining a central axis through the proximal and the distal portions; proximal threads extending along an outer surface of the proximal portion of the shaft; and distal threads extending along an outer surface of the distal portion of the shaft, the distal threads having crests at their outer extremities, the outer surface of the distal portion of the shaft defining roots of the distal threads, wherein bottom-most points of two adjacent roots of the distal threads define a root line, wherein tips of two adjacent crests of the distal threads define a crest line, wherein the root line and the crest line intersect the central axis, wherein the central axis and the root line define an angle a wherein the sum of the angles a