US Patent Issued on June 23 for "Method of assembling a pivotal bone anchor assembly with ring retainer and twist-in-place pressure insert" (Kansas Inventor)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,661,165, issued on June 23.

"Method of assembling a pivotal bone anchor assembly with ring retainer and twist-in-place pressure insert" was invented by Roger P. Jackson (Prairie Village, Kan.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of assembling a pivotal bone anchor assembly includes positioning a capture portion of a shank, a retainer, and an insert into a receiver. The receiver includes an internal cavity with a circumferential groove adjacent a bottom opening, a first channel with a discontinuous downward-facing surface below a guide and advancement structure, and an internal cylindrical surface with a fixed rotation abutment surface...