Navigation Links
New material mimics bone to create better biomedical implants
Date:2/16/2010

A "metal foam" that has a similar elasticity to bone could mean a new generation of biomedical implants that would avoid bone rejection that often results from more rigid implant materials, such as titanium. Researchers at North Carolina State University have developed the metal foam, which is even lighter than solid aluminum and can be made of 100 percent steel or a combination of steel and aluminum.

In a new paper, researchers have reported recent findings that, in addition to the extraordinary high-energy absorption capability and light weight of their novel composite foams, the "modulus of elasticity" of the foam is very similar to that of bone. Modulus of elasticity measures a material's ability to deform when pressure is applied and then return to its original shape when pressure is removed. The rough surface of the foam would also foster bone growth into the implant, improving the strength of implant.

Modulus of elasticity, which is measured in gigapascals (GPa), is extremely important for biomedical implants, explains Dr. Afsaneh Rabiei, an associate professor of mechanical and aerospace engineering and an associate faculty member of biomedical engineering at NC State and co-author of the paper.

"When an orthopedic or dental implant is placed in the body to replace a bone or a part of a bone, it needs to handle the loads in the same way as its surrounding bone," Rabiei says. "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. This is known as "'stress shielding.'" When this happens, the patient will need a revision surgery to replace the implant. Our composite foam can be a perfect match as an implant to prevent stress shielding," Rabiei explains.

To give an idea of the difference between the modulus of elasticity of bone and that of traditional implants, bone has a modulus of between 10 and 30 GPa while titanium has a modulus of approximately 100 GPa. The new composite foam has a modulus that is consistent with bone, and is also relatively light because it is porous.

The rough surface of the metal foam, Rabiei says, "will bond well with the new bone formed around it and let the body build inside its surface porosities. This will increase the mechanical stability and strength of the implant inside the body."


'/>"/>

Contact: Matt Shipman
matt_shipman@ncsu.edu
919-515-6386
North Carolina State University
Source:Eurekalert  

Related biology news :

1. Keck Foundation funds study of biological interactions with nanomaterials
2. New Delft material concept for aircraft wings could save billions
3. Scientists discover record-breaking hydrogen storage materials for use in fuel cells
4. Purdue researchers obtain a snapshot clarifying how materials enter cells
5. Ecologists, material scientists pursue genetics of diatoms elegant, etched casing
6. Genetic material under a magnifying glass
7. Material Technologies Holds First Electrochemical Fatigue Sensor Training for Private Inspection Firms
8. Sea cliff erosion, hemp construction materials and more at UCSD Engineering Conference
9. Lensless camera uses X-rays to view nanoscale materials and biological specimens
10. Creation of a new material capable of eliminating pollutants by the hydrocarbon industry
11. Scientists find that squid beak is both hard and soft, a material that engineers want to copy
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New material mimics bone to create better biomedical implants
(Date:3/27/2017)... , March 27, 2017  Catholic Health ... and Management Systems Society (HIMSS) Analytics for achieving ... Adoption Model sm . In addition, CHS previously ... U.S. hospitals using an electronic medical record (EMR). ... its high level of EMR usage in an ...
(Date:3/24/2017)... , March 24, 2017 The Controller General ... Controller Mr. Abdulla Algeen have received the prestigious international IAIR ... Continue Reading ... ... picture) and Deputy Controller Abdulla Algeen (small picture on the right) have ...
(Date:3/24/2017)... Mar 24, 2017 Research and Markets has ... Market Analysis & Trends - Industry Forecast to 2025" report ... ... at a CAGR of around 15.1% over the next decade to ... report analyzes the market estimates and forecasts for all the given ...
Breaking Biology News(10 mins):
(Date:3/27/2017)... DIEGO , March 27, 2017  Trovagene, Inc. ... that its Chief Executive Officer, Bill Welch , ... April 4, 2017 at 9:00 AM EDT at the ... .  Bill Welch, and Chief Scientific Officer, Mark ... with investors during the conference.   The presentation ...
(Date:3/24/2017)... Research and Markets has announced the addition of the "Human ... report to their offering. ... This report analyzes the Global market for Human Embryonic ... are provided for the period 2014 through 2022. Market data and ... The report profiles 25 companies including many key and niche players ...
(Date:3/23/2017)... ... 2017 , ... AxioMed president, Jake Lubinski, describes the AxioMed ... deformed, which is identical to how the human discs work to distribute force. ... to its natural state along a hysteresis curve, exactly like a healthy human ...
(Date:3/23/2017)... 2017  GlobeImmune, Inc. today announced it has entered ... 12,835,490 shares of its common stock to NantCell, Inc., ... with the sale of its common stock, NantCell has ... to GlobeImmune 200,000 shares, an estimated $2.0 million in ... are pleased to enter into this strategic agreement with ...
Breaking Biology Technology: