Bone anchor assemblies and related instrumentation

US11839411B2 · kind B2 · utility

Assignee

• Medos International Sarl · CH

Inventors

• Eric Biester · Raynham, US
• Michael Sorrenti · Bridgewater, US
• Ellen Wasserbauer · Mendon, US

Key dates

• Filing date: Dec 8, 2020
• Grant date: Dec 12, 2023
• Expiry date: Dec 3, 2041

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2090/037
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Bone anchor assemblies and related instrumentation are disclosed herein. In some embodiments, a modular bone anchor assembly allows for a bone anchor to be driven into bone and a head or receiver member to be attached thereto at some later point in time. The bone anchor can have a smaller footprint than the complete assembly, which can improve visualization and anatomical spatial awareness during insertion of the bone anchor and during other surgical steps performed prior to attaching the head or receiver member to the bone anchor. A variety of modular head types are disclosed, as are various instruments for driving a bone anchor, attaching a head to a bone anchor, removing a head from a bone anchor, and making a unilateral attachment to a head of a bone anchor assembly. Drive interfaces for driving a bone anchor are disclosed, as are features that allow a bone anchor to act as a fixation point for soft tissue retraction, disc space distraction, derotation, and the like.