Angularly adjustable intervertebral cages with integrated ratchet assembly

US11752006B2 · kind B2 · utility

Assignee

• Eit Emerging Implant Technologies GmbH

Inventors

• Guntmar Eisen · Tuttlingen, DE
• Detlev Ganter · Villingen-Schwenningen, DE
• Stephan Geiger · Wurmlingen, DE

Key dates

• Filing date: Nov 30, 2020
• Grant date: Sep 12, 2023
• Expiry date: Aug 16, 2041

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2002/30985
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The embodiments provide various interbody fusion spacers, or cages, for insertion between adjacent vertebrae. The cages may have integrated ratchet assemblies that allow the cage to change size and angle as needed, with little effort. The cages may have a first, insertion configuration characterized by a reduced size to facilitate insertion through a narrow access passage and into the intervertebral space. The cages may be inserted in a first, reduced size and then expanded to a second, larger size once implanted. In their second configuration, the cages are able to maintain the proper disc height and stabilize the spine by restoring sagittal balance and alignment. Additionally, the intervertebral cages are configured to be able to adjust the angle of lordosis, and can accommodate larger lordotic angles in their second, expanded configuration. Further, these cages may promote fusion to further enhance spine stability by immobilizing the adjacent vertebral bodies.