Spinal interbody cage comprising top and bottom faces with mesh structures, pillars and slots

US11278427B2 · kind B2 · utility

Assignee

• GARY A. ZICK, TRUSTEE OF THE EVEREST TRUST UTA APRIL 20, 2017 · US

Inventors

• George J. Picha · Independence, US
• Grant W. Phillips · Bedford, US
• Rachel Smith · Brecksville, US
• James PRICE · Conroe, US
• Gregory Causey · Broomfield, US

Key dates

• Filing date: Apr 9, 2019
• Grant date: Mar 22, 2022
• Expiry date: May 24, 2039

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2310/00317
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Spinal interbody cages are provided that include a bulk interbody cage, a top face, a bottom face, a top mesh structure, a bottom mesh structure, pillars, and slots. The top and bottom faces are exterior surfaces of the bulk interbody cage having a top central opening and a bottom central opening, respectively. The top and bottom mesh structures extend from the bulk interbody cage across the top central opening and the bottom central opening, respectively. The pillars are for contacting vertebral bodies. The slots are to be occupied by bone of the vertebral bodies and/or by bone of a bone graft. The spinal interbody cage has a Young's modulus of elasticity of at least 3 GPa, and has a ratio of the sum of (i) the volumes of the slots to (ii) the sum of the volumes of the pillars and the volumes of the slots of 0.40:1 to 0.90:1.