Paragraph Number

5

Implementations may include one or more of the following features. The implant assembly where the lock feature may include a plurality of radial grooves and the head feature may include a plurality of ridges, the plurality of radial grooves adapted to engage the plurality of ridges. The implant assembly may include a rotation limiter adapted to engage the rotatable structure and limit a degree of rotation of the rotatable structure. The rotation limiter may include a first flat surface of the bone plate and a first corresponding surface of the rotatable structure, the first flat surface and first corresponding surface configured to limit rotation of the rotatable structure beyond the locked orientation. The rotation limiter may include a second flat surface of the bone plate and a second corresponding surface of the rotatable structure, the second flat surface and second corresponding surface configured to limit rotation of the rotatable structure beyond an unlocked orientation. The degree of rotation is up to about 50 degrees. The bone plate may include a recess adapted to receive the rotatable structure; the recess may include a first flat surface adapted to engage a first corresponding surface of the rotatable structure to limit rotation of the rotatable structure beyond a locked orientation. The screw opening is configured to enable the screws to pivot within the screw opening within a range of motion ranging between approximately 45 degrees and approximately -45 degrees and where the head feature and lock feature are adapted to engage with each other with the screw pivoting within the range of motion and the rotatable structure in the locked orientation.

Added by DJM 5 2021