US Patent Issued on Oct. 27 for "Bottom-loaded pivotal bone anchor with shank head collet containment" (Kansas Inventors)

ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,773,239, issued on Oct. 27.

"Bottom-loaded pivotal bone anchor with shank head collet containment" was invented by Roger P. Jackson (Prairie Village, Kan.) and James L. Surber (Kansas City, Kan.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A receiver assembly of a pivotal bone anchor includes a receiver housing portion, an expandable collet retainer portion, and an outer sleeve member. The receiver housing portion includes a pair of upright arms defining an open channel configured to receive the elongate rod. The collet retainer portion includes an inner surface defining a center through aperture configured to expandingly receive the head of the shank...