Patent ID: 11883082
Assignee: nan
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A spinal bone anchor attachment device adapted for use with a pedicle screw, comprising:
an elongated multi-laterally split partial base portion split along, and adapted for insertion of the pedicle screw along, a central longitudinal axis of said partial base portion;
an elongated multi-laterally split partial shaft portion split along, and adapted for insertion of the pedicle screw along, a central longitudinal axis of said partial shaft portion, said partial shaft portion being split into at least a first side and a second side;
an elongated concave inner surface within said partial shaft portion adapted for engaging the pedicle screw;
a biased tip portion having a displaced tip and connecting the first side and the second side of the split partial shaft portion, said biased tip portion comprising a leading first end of the spinal bone anchor attachment device, said biased tip portion being positioned opposite said partial base portion, wherein the displaced tip of said biased tip portion is displaced relative to the central longitudinal axis of the split partial shaft portion and thereby adapted for biased guiding of the spinal bone anchor attachment device and the pedicle screw into the spinal bone; and
a plurality of courses of bone engaging ridges extending outwardly from and along at least a portion of the length of said partial shaft portion, wherein said partial base portion, said partial shaft portion, and said tip, are adapted to cause the anchor attachment device to expand apart upon subsequent installation of the pedicle screw to better engage an inner cortical bone portion of the pedicle, and thereby enhance sturdiness of the vertebral stabilization procedure.