System for anchoring a pedicle screw, associated kit, spacer and pedicle augmentation

US9421040B2 · kind B2 · utility

Assignee

• Aesculap AG · DE

Inventors

• Jens Beger · Tuttlingen, DE
• Susanne Klingseis · Biberach, DE

Key dates

• Filing date: Jul 21, 2014
• Grant date: Aug 23, 2016
• Expiry date: Sep 29, 2034

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61L2430/38
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A system for anchoring a pedicle screw in a patient's vertebra uses a pedicle screw having a threaded portion sinkable in the vertebral arch. The space between the threaded portion and cortical edge layer of the pedicle is at least partially filled by a spacer that enables an all-round support of the threaded portion at the cortical edge layer. A kit includes a pedicle screw and a spacer which at least partially fills the space between the threaded portion and cortical edge layer of the pedicle. A spacer has an essentially oval cross-section for form-locking fit in a corresponding axial recess sunk in the pedicle and having an axial through-hole to accommodate the threaded portion of a pedicle screw, as well as a spacer in the form of an essentially cylindrical pedicle augmentation in the form of a bone screw or a bone bracket.