Polyaxial pedicle-screw

US6402752B2 · kind B2 · utility

Assignee

• Ulrich GmbH & Co. KG · DE

Inventors

• Martin Schäffler-Wachter · Neu-Ulm, DE
• Helmut Schonhoffer · Ulm, DE

Key dates

• Filing date: Feb 7, 2001
• Grant date: Jun 11, 2002
• Expiry date: Feb 7, 2021

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B17/7038
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A pedicle-screw assembly has a screw extending along an axis and having a threaded shaft and a round head, an inner cap part carried on the head and swivelable on the head, and an outer cap part forming with the inner cap part a seat adapted to hold an end of a distraction/stabilizing rod. The outer cap part has formations engageable in a snap fit over the inner cap part, and an element on the outer cap part can be tightened to fix the rod in the seat. The outer cap part is generally U-shaped and formed with a base forming the seat and a pair of legs projecting parallel to the axis, flanking the cap inner part, and having ends engaged in a snap fit around sides of the cap inner part.