GC EUROPE G-aenial - Manual (Page 17)

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0 5 10 15 20
Filtek Supreme XTE
Filtek Z250
EsthetX HD
Herculite XRV Ultra
IPS Empress Direct
Tetric EvoCeram
Venus
CeramX Mono
G-ænial P
G-ænial A
Estelite ∑ Quick
0,0 0,5 1,0 1,5 2,0 2,5 3,0
Filtek Supreme XTE
Filtek Z250
EsthetX HD
Tetric Evoceram
IPS Empress Direct
Venus
CeramX mono
G-ænial P
G-ænial A
Estelite ∑ Quick
G-ænial Anterior & Posterior Technical Manual
6.0 Physical properties
6.1 modulus of elasticity and fracture toughness
the modulus of elasticity (Young’s modulus) – a measure of the rigidity of the material – is defined
by the initial slope of a stress-strain curve. a material with a high modulus is stiff and rigid, whereas
a material with a low modulus is flexible. ideally, a material should not have a too high modulus
of elasticity as brittle materials are less able to buffer masticatory pressure.
Figure 25: modulus of elasticity of various composite materials. Source: Gc corporation
Fracture toughness is a measure of a material’s ability to resist the propagation of a formed crack,
also defined as the toughness against bending stress. the toughness is related to the energy
absorbed in the bending process. the toughness is calculated as the underlying area of the Stress-
Strain curve. a higher value for fracture toughness implies a better resistance to the catastrophic
propagation of cracks.
Figure 26: Fracture toughness of various composite materials. Source: Gc corporation
the modulus of elasticity of G-ænial was
determined according to the iSO
4049:2000 specifications.
G-ænial Anterior is shown to
be amongst the most flexible
of the tested composites.
G-ænial Posterior shows a
similar flexibility compared to
most composites tested.
Flexible materials have the
ability to buffer forces in (high)
stress- bearing areas.
test method is based on aStm e-399,
Fracture toughness test
the following can be concluded
from this test:
G-ænial shows an ability to resist
the propagation of cracks similar
to most of the competitors
tested and better than tetric
evo ceram, ceramX mono.
modulus of elasticity (GPa)
Fracture toughness (mPa)