Stemless metaphyseal humeral implant

US11833056B2 · kind B2 · utility

Assignee

• Howmedica Osteonics Corp. · US

Inventors

• Philip T. Kemp · White Plains, US
• Andrew J. Nelson · New City, US
• Jan Heinsohn · Hoboken, US
• Rajan Yadav · New Delhi, IN
• Koustubh Rao · Barwala, IN
• Gennaro A. Barile · Secaucus, US
• Ashish Mehta · Gothan, IN
• Venkateswaran Perumal · Bhangrola, IN
• David Viscardi · Glen Rock, US

Key dates

• Filing date: Dec 21, 2021
• Grant date: Dec 5, 2023
• Expiry date: Dec 21, 2041

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2002/4619
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A stemless prosthetic shoulder joint may include a prosthetic humeral head and a stemless base. The stemless base may include a collar and an anchor extending from the collar intended to anchor the base into the proximal humerus. The anchor may include various features to enhance the fixation of the base, including hooks, threads, and/or expandable members that may be transitioned from a contracted insertion condition to an expanded implanted condition once the base is positioned in the bone. The anchor and/or collar may also include additional features to enhance fixation, such as geometries and surface features to enhance fixation to bone. The anchor may include a plurality of chisel slots to facilitate removal of bone during a revision surgery.