Patent ID: 11931078
Assignee: ANZA INNOVATIONS, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 13:
14. A method of assembling a polyaxial anchor assembly, comprising:
providing a bone anchor having a first end, a second end, a longitudinal axis extending through the first and second ends, and a neck positioned on the longitudinal axis between the first end and the second end, the first end comprising a partially spherical head and a recess formed within the head;
providing a receiver having a first receiver end, a second receiver end, and a receiver axis extending through the first and second receiver ends, the first receiver end comprising a socket cavity, a socket aperture, and an interference element extending over a portion of the socket aperture, wherein the interference element is configured to prevent translation-only insertion of the head into the socket cavity from any initial angular orientation of the bone anchor relative to the receiver;
inserting a first portion of the head into the socket aperture, and thereafter:
(a) rotating the bone anchor in a first rotation direction; and
(b) rotating the bone anchor in a second rotation direction different from the first rotation direction such that the head is captured within the socket cavity and the bone anchor is pivotable about the socket cavity.