GC EUROPE G-aenial Universal Flo - Manual (Page 9)

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0,0 0,5 1,0 1,5 2,0 2,5 3,0
G-aenial Universal Flo
Filtek Z100
Filtek Supreme
Herculite XRV
Tetric EvoCeram
Clearfil Majesty Flow
N'Durance
* Means with the same letter are not significantly different (Tukey, p < 0.05)
*a
*b
*c
G-ænial Universal Flo Technical Manual
6.2.2 Fracture toughness
Definition: Fracture toughness is a measure of the 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.
Figure 6: Fracture toughness of various composite
materials.
This test was conducted according to the chevron
notched Beam (cnB) Method
Source: De Munck et al., Belgium, K.U.Leuven
-BIOMAT, abstract presented at CED-IADR
meeting Budapest, Sept. 2011’.
Within the limitations of this test it can
be concluded that G-aenial Universal
Flo shows a similar or higher ability
to resist to propagation of cracks
compared to conventional
composites.
6.3 Three–body wear resistance
Definition: Wear is the loss of material resulting from the contact of two or more material. The
three-body wear test is used to obtain a closer reproduction of the wear in the oral cavity, including
contact with opposing dentition, and the presence of a bolus (using a slurry of PMMa and glycerol
in the test).
Figure 7: Three-body wear resistance test set-up
composite specimens were prepared using a metal mold and cured according to the manufacturer’s instructions for use. all
specimens were stored in water at 37 °c for 24 hours and wear resistance tests were performed with a three-body wear machine.
The abrasive slurry was prepared by mixing 100 g of PMMa powder with 100 ml of glycerol and was then spread over a PMMa
plate stage.
Specimens were moved up and down along a 5 cm path at a rate of 50 strokes per minute and held in indirect contact with an
acrylic plate under a load of 350 g.f. Simultaneously, the sample holder was moved horizontally along a 10 mm path at a rate
of 50 strokes per minute. after 100,000 cycles (one complete lateral and vertical movement counts for one cycle), wear of the
material was evaluated by the height loss.
Fracture Toughness (MPa)
1mm
2mm
2mm
2mm
7mm
Sample holder
Composite slurry
Acrylic plate