Bone plate system and methods of using the same

A spinal fixation system comprising:

• a fixation member having a proximal end and a distal end, the proximal end comprising a head;
• a locking ring configured to at least partially reside on the head, wherein the locking ring is a non-continuous ring;
• and
• a spinal implant comprising a through-hole, the through-hole comprising an upper portion, a groove adjacent the upper portion and a lower portion adjacent the groove, the head is receivable in the through-hole;
• wherein the locking ring is adapted to be rotatably positioned on the head such that in an unlocked position the locking ring is outside the groove of the through-hole and in a locked position the locking ring is at least partially within the groove of the through-hole.

A method of securing a spinal implant, the method comprising:

• positioning a spinal implant within a patient, the spinal implant comprising a through-hole with a groove;
• inserting a threaded screw body through the through-hole and into a vertebral body, the threaded screw body having a center-axis, a proximal end, and a distal end with a head positioned within the through-hole;
• and
• rotating a locking ring positioned on the head of the threaded screw body from an unlocked position to a locked position in which the locking ring is positioned at least partially within the groove.