Bone anchoring assembly

US9144437B2 · kind B2 · utility

Assignee

• BIEDERMANN TECHNOLOGIES GMBH & CO. KG · DE

Inventors

• Wilfried Matthis · Kenzingen, DE
• Lutz Biedermann · Villingen-Schwenningen, DE
• Gerhard Pohl · St. Georgen, DE

Key dates

• Filing date: Jun 19, 2009
• Grant date: Sep 29, 2015
• Expiry date: Apr 14, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B17/7037
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A bone anchoring assembly includes a bone anchoring element having a shank to be anchored in a bone or a vertebra, and a receiving part for receiving a rod. The assembly includes a rod made at least partly of a material which exhibits a material flow under pressure. The receiving part includes a channel with an approximately U-shaped cross-section with two free legs, a first locking element cooperating with the legs to secure the rod in the channel, and a second locking element cooperating with the first locking element and acting independently from the first locking element onto the rod. A pin-shaped projection is provided at the second locking element which comes into contact with the rod when tightening the second locking element, and at least one pin-shaped projection is provided in the channel which comes into contact with the rod when tightening the first locking element.