Patent ID: 9668795
Date: 2017-06-06
CPC Classifications: A61B

Claim:
1. A bone plate assembly comprising: a bone screw having a threaded shank along a distal end portion thereof, a bone plate having an aperture, said threaded shank configured to pass through the aperture of the bone plate; a dynamic member configured to receive a head of said screw and comprising a mechanism configured to allow movement of said dynamic member relative to the bone plate in a first movement direction, but to prevent movement of said dynamic member relative to the bone plate in a direction opposite to said first movement direction; and a backout prevention member comprising an undercut extending from the aperture into the bone plate, configured so that at least a portion of said dynamic member and a portion of said head of said screw are overlaid by said bone plate when entering into said undercut, to prevent backout of said dynamic member and said screw during use.