Stryker Corp., a subsidiary of Howmedica
Osteonics Corporation, faces lawsuits regarding the company's
recalled Accolade TMZF hip stem and LFIT anatomic V40 femoral
head. The lawsuits claim Stryker Corp. failed to warn the device
may corrode, causing severe metal toxicity (metallosis) in
patients. Stryker Corp. is also the manufacturer of the
defective Rejuvenate and ABG II modular-neck stems, which were
recalled in July 2012. The Accolade TMZF was later recalled in
October 2012. According to the FDA, the
manufacturer's reason for the recall was due to grit
blast media, which was observed in the drive hole. Grit blast
media, a term referring to any fine powder used as an abrasive, was
found as the wearing debris due to the compromised wearing
resistance of the titanium alloy (Chen and Thouas 121)* in the hip
stem. The Stryker Accolade is associated with the release of cobalt
and chromium metals into the bloodstream. The femoral head of the
Accolade hip implant is made with a cobalt and chromium alloy,
whereas the hip stem is made with titanium alloy. The
combination of the femoral head and hip stem causes
significant corrosion and fretting, resulting in metallosis
and subsequently permanent damage to tissues and bone, as
well as pseudotumors. The Stryker Accolade TMZF, like the
Stryker Rejuvenate and ABG II implants, was designed and
manufactured without structures that prevent fretting and
corrosion. Additionally, Stryker discontinued using TMZF titanium
concurrent to the Rejuvenate and ABG II recalls. Our
attorneys have extensive experience, and proven results,
litigating defective hip cases. Contact an attorney for a free case
consultation if you have a Stryker Accolade TMZF. We focus on
your case, so you can focus on yourself. *Biomaterials: A Basic
Introduction, by Qizhi Chen and George Thouas
FEATURED AUTHOR
Qizhi Chen
Qizhi Chen, PhD, Imperial College London Professor in Materials Science and Engineering
Biography
Dr Qizhi Chen, tenured professor of Monash University, has previouly worked for the National Heart and Lung Institute London, Imperial College London, University of Cambridge, and University of Hong Kong. She has produced ca. 180 research publications, which have received ca. 11600 citations with h-index 45. Dr Chen secured external research grant applications of about $4m, as PI, co-PI or CI.Dr Chen is a well-balanced university academic, striving for excellence in both education and research. She believes that universities survive on education and gain reputations from both education and research.
Education
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PhD in Mat & Biomed Eng, Imperial College London
BSc in Physics, North-Eastern University, China
Areas of Research / Professional Expertise
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Materials Science and Engineering
Biomaterials and Biomedical Engineering
Personal Interests
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Music, Opera, Movie, Painting, History, Military
Websites
Books
Articles
metallic implant biomaterials
Published: Jul 19, 2015 by elsevier
Authors: qizhi chen
Subjects:
Materials Science
This review focuses on metallic implant bio-materials, identifying and discussing critical issues in their clinical applications, including the systemic toxicity of released metal ions due to corrosion, fatigue failure of structural components due to repeated loading, and wearing of joint replacements due to movement.
Photos
News
Textbook, Biomaterials: A Basic Introduction, aids legal practioners
By: Qizhi Chen
Subjects: Engineering - Mechanical
Stryker Accolade TMZF: Metal on Metal Hip Implant Corrosion
12/9/2014
Videos
Beating heart cells differentiated from embryonic stem cells
Published: Apr 19, 2016