Patent · US Active

Polyaxial pedicle screw

US9198695B2 · kind B2 · utility

43Cited by

274References

15Claims

0Family size

Assignee

Zimmer Spine, Inc. · US

Inventors

Alan E. Shluzas · Redwood City, US
Hugh D. Hestad · Edina, US

Key dates

Filing date	Feb 27, 2013
Grant date	Dec 1, 2015
Priority date	—
Expiry date	Oct 16, 2033

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B2017/00526
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A polyaxial bone anchor including a housing, a bone screw, and a retainer for pivotably coupling the head of the bone screw to the housing. The retainer is positioned into the bore of the housing and includes a plurality of alternating tabs and slots circumferentially arranged to define a cavity for receiving the head portion of the bone screw therein. The retainer is axially moveable in the housing from a first position in which the head portion is not passable through the lower opening of the retainer to a second position in which the head portion is passable through the lower opening of the retainer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.