Medtech1.com: Great Information, Real Community, Better Living.
 Register
 Login
 Main Page
 MedTech News
Tech & Innovation
Living With a Device
 Education Center
Diagnostic Tests
Conditions
Procedures
Women's Health
Companies
Online Resources
Video Library
Dr. Christopher Kwolek  MedTech  Hero™
Dr. Christopher Kwolek:
Pioneering New Blood Clot Treatments.
About Heroes
 Join the Discussion in  Our Forums
 Community
MedTech1 Forums
 Advocacy Center
Contact Congress
Find a Patient Group
 Bookmark Us
 
advertisement
Search the Body1 Network
October 17, 2017  
MEDTECH NEWS: Latest Headlines

  • Print this Article
  • Email this Article
  • Links/Reprints
  • Discuss this Article
  • medtech

    Foam Bones: A New Generation of Biomedical Implants


    February 17, 2010

    Stephanie Lachapelle for Medtech1

    Researchers at North Carolina State University have developed a metal foam material that may be used in bone implants.

    Two common failures of conventional bone replacements are bone rejection and stress shielding. Bone rejection occurs when a rigid implant material like titanium metal is used to replace all or part of a bone, and the body rejects the material. Stress shielding occurs when an implant is unable to handle the amount of stress naturally placed on the limb. "If the modulus of elasticity of the implant is too much bigger than the bone, the implant will take over the load bearing and the surrounding bone will start to die. This will cause the loosening of the implant and eventually ends in failure”, says Dr. Afsaneh Rabiei, an associate faculty member of biomedical engineering at North Carolina State University and one of the researchers working on the new implant material. "When this happens, the patient will need a revision surgery to replace the implant,” he explains.
    The new foam material is structured to avoid both of these common complications. This new material is lighter than solid aluminum, and can be made fully of steel or a combination of steel and aluminum. The material was designed to absorb the shock that a natural bone is subjected to during movement, and to foster new bone growth into the implant to improve the strength of the implant.

    The material also has a high “modulus of elasticity”, which is a measure of the ability of a material to deform when pressure is applied, and to reform when pressure is removed. Measured in gigapascals (GPa), natural bone has a modulus between 10 and 30 GPa, whereas titanium has a modulus of approximately 100 GPa. The foam metal has a modulus closer to that of natural bone while maintaining a low mass due to its porous nature.

    Researchers hope that this new metal foam will increase mechanical stability and the strength of the implant while decreasing the failure rate of bone implants.

    Last updated: 17-Feb-10

       
    Interact on Medtech1
    DISCUSS THIS ARTICLE
    Ask a question or share your opinions on this topic with others in the Body1 community.
     
    Latest Headlines Archives
    Going for Gold With a Novel Interventional Radiology Treatment for Pancreatic Cancer

    Foam Bones: A New Generation of Biomedical Implants

    Tongue-Controlled Wheelchair Holds Hope for the Quadriplegics and Others

    Can ‘Report Cards’ on Clinics Improve Patient Care?

    Going out Green – Boomers Reinvent the Funeral Industry

    Next 5 Features ...

    More Headlines ...

     
    Home About Us Press Jobs Advertise With Us Contact Us
    advertisement
    © 2017 Body1 All rights reserved.
    Disclaimer: The information provided within this website is for educational purposes only and is not a substitute for consultation with your physician or healthcare provider. The opinions expressed herein are not necessarily those of the Owners and Sponsors of this site. By using this site you agree to indemnify, and hold the Owners and Sponsors harmless, from any disputes arising from content posted here-in.