BIOLOX - Nanocomposite for Arthoplasty

Tribology and Arthroplasty
Competence in Ceramics
Material Properties
The Strengths of BIOLOX ® delta
Large Diameters
12
Enhanced Biomechanical Properties
The advantages of ceramic materials are
especially apparent in large diameters
(≥32mm). Simulator studies show that
the rates of wear remain low despite the
significantly larger friction surfaces, i.e.
significantly lower than those of other
materials. With ceramic components,
surgeons are no longer forced to make a
tradeoff between wear rates and diameter,
and can instead choose the best option for
their patients.
Better Tribology
Dramatically reduced wear, expanded
range of motion and increased resistance
to dislocation make this bearing the number
one choice when it comes to functional
improvement, durability and safety. In
contrast to bearings with conventional
and highly crosslinked polyethylene, the
rate of wear does not increase for ceramicon-ceramic
bearings in the case of larger
diameters. Given that BIOLOX ® delta shows
even lower rates of wear in the simulator
than BIOLOX ® forte, one can expect that
it is superior to all other materials for bearings
with large diameters.
Hip Joint Simulator – Highly Crosslinked Polyethylene
Long-term wear rate after 10 million cycles
Negative Effect of Increased
Metal Head Size
Volume wear rate (mm 3 per million cycles)
Hip Joint Simulator – Highly Crosslinked Polyethylene
Long-term wear rate after 10 million cycles
Positive Effect of Alumina Ceramic
Femoral Ball Head Compared to
Metal Femoral Ball Head
Volume wear rate (mm 3 per million cycles)
12
12
10
8
6
4
2
0
28mm
Metal femoral
ball head on XPE
36mm
Metal femoral
ball head on XPE
Fisher J, University of Leeds, 2006
10
8
6
4
2
0
36mm
Metal femoral
ball head on XPE
36mm
Alumina ceramic
femoral ball head on XPE
Source: Fisher J, University of Leeds (UK), 2006
Fisher J, University of Leeds, 2006