Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Using Nanotechnology to Boost the Lifespan of Medical Implants

Professor Leon Shaw with a graduate student in his lab at the Institute of Materials Science. Photo by Peter Morenus
Professor Leon Shaw with a graduate student in his lab at the Institute of Materials Science. Photo by Peter Morenus

Abstract:
His work in the red-hot area of nanotechnology has sparked three NSF-funded research awards for Leon Shaw, a professor in the Department of Chemical, Materials, & Biomolecular Engineering.

Using Nanotechnology to Boost the Lifespan of Medical Implants

Storrs, CT | Posted on January 9th, 2010

Of the three, one marries nano-materials with biomedical engineering. Together with Yong Wang, an assistant professor of chemical, materials, and biomolecular engineering, Shaw will work on developing a titanium/hydroxyapatite orthopedic implant designed to improve implant longevity and reduce the need for revision surgery, thus reducing long-term health care costs and patient stress.

Over 10 million Americans currently carry at least one major implanted medical device in their bodies. Due to their excellent corrosion resistance, superior strength, and biocompatibility, titanium and stainless steel alloys are the principal materials used in most medical implants. Despite their advantages, these alloys also carry major disadvantages: in many cases, their life expectancy is shorter than those of their wearers, prompting additional replacement implant surgeries.

In addition, titanium and steel alloys are unlikely to have the stability or fit of the original tissue, leading to rejection of the implant. While currently available implants may alleviate pain and allow patients to live active lives, there are often complications getting bone to attach to the metal devices. Small gaps between natural bone and the implant can expand over time, requiring additional surgery to replace the implant. Researchers are increasingly turning to nanotechnology for solutions.

To overcome the problems associated with metallic implants, many research organizations and commercial companies have tried to develop orthopedic implants that have a bioactive surface to promote cellular adhesion and bony in-growth. Efforts have been made to create a stable fit that more closely resembles the original tissue, thus eliminating the need for additional surgery to repair the damage or gaps.

The two most widely used methods involve the application of either hydroxyapatite or porous titanium coatings to implant surfaces. The problem is that titanium is not bioactive, whereas hydroxyapatite coatings could delaminate during use. With this in mind, Shaw and Wang have geared their project toward the development of a new family of functionally graded, porous implant materials with a hierarchy of engineered microstructures. This new family of orthopedic implants will address the issues by applying either hydroxyapatite or porous titanium coatings and will be fabricated through a novel solid freeform fabrication method developed in Shaw's laboratory. This type of orthopedic implants is the first of its kind to pair a titanium-rich core and a hydroxyapatite-rich surface with a controlled level of micro- and macro-porosity never produced previously.

Shaw's other NSF grants are also collaborative efforts. Shaw will be teaming with Kennametal Inc., a global leader in hard metal technology. This project is aimed at the development of innovative manufacturing methods that can produce novel materials with superior mechanical properties derived from nanocrystalline powder. The collaboration will ensure that the research is relevant to the hard metal industry and that the results will be disseminated to end users.

The third research project is in collaboration with Mahmoud Zawrah, a researcher from the National Research Center in Cairo, Egypt. Together, they are looking at the processing and fabrication of nano-Si3N4 and SiC composites using the waste material silica fume as the starting material. If successful, this project will lead to advancements in the production of large quantities of high purity nano-composite powders and sintered (or densified) Si3N4/SiC components from silica fume in a reproducible, precise, and economical fashion.

####

About University of Connecticut
Perennially ranked the top public university in New England, the University of Connecticut now stands among the best public institutions in the nation. UConnís main campus in Storrs is admitting the highest-achieving freshmen in University history. Student diversity continues to increase, as does the number of honors students, valedictorians and salutatorians who consistently make UConn their top choice.

For more information, please click here

Copyright © University of Connecticut

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Superheroes are real: Ultrasensitive nonlinear metamaterials for data transfer June 25th, 2016

Russian physicists create a high-precision 'quantum ruler': Physicists have devised a method for creating a special quantum entangled state June 25th, 2016

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Ultrathin, flat lens resolves chirality and color: Multifunctional lens could replace bulky, expensive machines June 25th, 2016

Govt.-Legislation/Regulation/Funding/Policy

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Ultrathin, flat lens resolves chirality and color: Multifunctional lens could replace bulky, expensive machines June 25th, 2016

Particle zoo in a quantum computer: First experimental quantum simulation of particle physics phenomena June 23rd, 2016

Titan shines light on high-temperature superconductor pathway: Simulation demonstrates how superconductivity arises in cuprates' pseudogap phase June 22nd, 2016

Nanomedicine

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Self-assembling icosahedral protein designed: Self-assembling icosahedral protein designed June 22nd, 2016

Stealth nanocapsules kill Chagas parasites in mouse models June 22nd, 2016

Announcements

Superheroes are real: Ultrasensitive nonlinear metamaterials for data transfer June 25th, 2016

Russian physicists create a high-precision 'quantum ruler': Physicists have devised a method for creating a special quantum entangled state June 25th, 2016

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Ultrathin, flat lens resolves chirality and color: Multifunctional lens could replace bulky, expensive machines June 25th, 2016

Nanobiotechnology

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Tailored DNA shifts electrons into the 'fast lane': DNA nanowire improved by altering sequences June 22nd, 2016

Self-assembling icosahedral protein designed: Self-assembling icosahedral protein designed June 22nd, 2016

Stealth nanocapsules kill Chagas parasites in mouse models June 22nd, 2016

Alliances/Trade associations/Partnerships/Distributorships

FEI and University of Liverpool Announce QEMSCAN Research Initiative: University of Liverpool will utilize FEIís QEMSCAN technology to gain a better insight into oil and gas reserves & potentially change the approach to evaluating them June 22nd, 2016

French Research Team Helps Extend MRI Detection of Diseases & Lower Health-Care Costs: CEA, INSERM and G2ELab Brings Grenoble Regionís Expertise In Advanced Medicine & Magnetism Applications to H2020 IDentIFY Project June 21st, 2016

Research showing why hierarchy exists will aid the development of artificial intelligence June 13th, 2016

UK NANOSAFETY GROUP publishes 2nd Edition of guidance to support safe working with nanomaterials May 30th, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic