TKK Materials Processing and Powder Metallurgy develops superior implants
Hundreds of thousands of implant operations are done around the world every year. One of the largest implants is a replacement hip prosthesis, which is a relatively common implant even in Finland. The TKK Laboratory of Materials Processing and Powder Metallurgy has developed a new type of ceramic composite, which provides a significant increase in the toughness and wear-resistance of prosthetic components.
New ceramic prostheses are superior to the older metal-polymer type
prostheses, particularly due to their low friction, high
wear-resistance and excellent biocompatibility. Pure ceramics,
however, is fragile, so increasing the toughness and wear-resistance of
ceramic prosthetic components is extremely desirable.
Working within a number of EU research projects, the TKK Materials Processing and Powder Metallurgy research group has developed a new type of functionally graded ceramic composite, which provides a significant increase in the strength of prosthetic components (+75%) and a five-fold increase in wear-resistance. The material combination offers optimal tension distribution, which has a positive impact on such properties as impact resistance. Use of this material allows prosthetics to be custom-tailored to achieve a whole new degree of safety.
Professor Michael Gasik
Helsinki University of Technology
Faculty of Chemistry and Materials Science
Materials Science and Engineering
tel. 09 451 2769
mgasik [at] cc [dot] hut [dot] fi
Image: TKK/ Materials Processing and Powder Metallurgy. Stress distribution in new ceramic components for a femoral ball and acetabular cup hip prosthesis.