P1190002

WHY

The failure of the hip replacement is often a combination of tribocorrosion of the hip joint materials and inflammations due to wear particles in the body. A new methodology needs to be developed so as to allow for a fast prescreening of the reliability of new biomaterials, in conditions that simulate the actual conditions (e.g. environment, motion, contact pressure, countermaterial). 

HOW

Based on the pioneering work of Dr. Vesa Saikko, using a circular translation pin-on-disk (CTPOD) we applied the method with our multistation machine (Phoenix Tribology). To simulate the actual contact, ultra high molecular weight polyethylene (UHMWPE) pins were used as counter materials, the materials under investigation are nano-composite coatings.  The tribosystem is immersed in a 10% bovine calf serum (simulating body fluids). This test setup allows to run for up to 50 tests in parallel. After testing the weight loss of the UHMWPE and biomaterials was measured, whereas the surface morphology was evaluated by confocal microscopy.

 

b2ap3_thumbnail_50-station Applications

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RESULT

Efficient screening of joint materials showed 

b2ap3_thumbnail_Ranking_bio_50-station Applications

b2ap3_thumbnail_50-station_evolution-of-wear Applications