Expanding interbody spacers

US11583413B2 · kind B2 · utility

Inventors

• Daniel Manwill · Provo, US
• Peter Halverson · Draper, US
• David T. Hawkes · Pleasant Grove, US

Key dates

• Filing date: Mar 8, 2019
• Grant date: Feb 21, 2023
• Expiry date: Mar 8, 2039

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2002/4615
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An expandable interbody spacer includes a first endplate surface located on a first side of the spacer and adapted to contact a vertebral endplate surface of a first vertebral body, a second endplate surface located on a second, opposed, side of the spacer and adapted to contact a vertebral endplate surface of a second, opposed, vertebral body and an expansion mechanism adapted to selectively apply a distracting force between the first endplate surface and the second endplate surface, whereby actuation of the expansion mechanism causes the spacer to transition between a compressed insertion configuration to an expanded fusion configuration. The spacer also includes one or more of a deformable surface, a porosity to promote bone on-growth or through-growth, a stiffness substantially equivalent to cortical bone, and structure distributing loads through the spacer substantially without transferring the loads through higher-stiffness structures.