Instrument for guiding a rod into an implant holder

US11045232B2 · kind B2 · utility

Assignee

• Aesculap AG · DE

Inventors

• Kay Fischer · Tuttlingen, DE
• Sven Krüger · Würzburg, DE

Key dates

• Filing date: Feb 2, 2017
• Grant date: Jun 29, 2021
• Expiry date: Jan 1, 2038

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2017/00477
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An instrument for guiding a rod into a holder of an implant, in particular a pedicle screw, includes a coupling unit for coupling the instrument to the implant, in particular a head of the pedicle screw, a threaded rod that can be positioned in the axial direction relative to the coupling unit, and at least one internally threaded segment that is arranged in an axially fixed manner relative to the coupling unit, and can be positioned in a radial direction relative to the threaded rod, and prestressed toward the threaded rod by a prestressing element applying a radial force. The internally threaded segment can be brought into engagement with, and disengaged from, the male thread of the threaded rod by radial positioning. Thread flanks of the threaded rod and thread flanks of the internally threaded segment face each other and are each formed with an undercut.