Out-of-round pedicle screw

US10413343B2 · kind B2 · utility

Assignee

• Aesculap AG · DE

Inventors

• Stephan Lindner · Wurmlingen, DE
• Juan-Jose Bogajo · Wurmlingen, DE

Key dates

• Filing date: Jun 25, 2014
• Grant date: Sep 17, 2019
• Expiry date: Jun 1, 2036

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B17/7035
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A medical bone screw in particular in pedicle screw design includes a screw-and-thread shaft which has a distal shaft portion of a preferably smaller core diameter that transitions into a proximal shaft portion of a preferably larger core diameter, whose proximal end is provided with a screw head. The core cross-sectional shape along the distal shaft portion is formed to be out-of-round, preferably polygonal, and the core cross-sectional shape along the proximal shaft portion is formed to be circular.