Source: DIFK Deutsches Institute fur Feuertest und Keramik GmbH, Bonn, Germany Material Strength of Zirconia Produced with Two Methods.
Determined according to DIN EN 993-6 and quality assurance methods TOSOH
Date of testing: 6/19/2008
2.
Source: www.wieland-dental-systems.com
3.
Source: nobelbiocare.com
4.
Source: www.etkon.de
5.
Source: www.3m.com
6.
Source: www.vita-zahnfabrik.com
7.
Source: cercon-smart-ceramics.com
On the assumption of a maximum chewing strength of 290 N, it is postulated that an endurance limit of approximately 500 N is required, which is given at an initial strength of at least 1000 N.The characteristics of ORIGIN YZ zirconia can be summed up as follows:
ORIGIN YZ Zirconia
KIC=7.0MPa•m1/2
Fracture Toughness
m=14;2
Weibull Parameter
Since the mid-1980s, zirconia has held a steady position in high-performance ceramics. More than 300,000 artificial hip joint implants and several thousand dental implants are impressive testimonies to the biological compatibility of zirconium dioxide.
There are no uncontrollable risks or long-term deficiencies to be expected in the area of dentistry associated with the use of high quality yttrium stabilized zirconia blocks.
ORIGIN YZ Zirconia Discs Have Been Tested & Proven to Be Superior for Various Milling Tools and Methods with No Margin Chipping
ORIGIN Has the Highest Fracture Toughness (KIC) of 7.0
(Determination of Modulus of Rupture (MOR)) Determined According to DIN EN 993-6
Date of Testing: June 19th, 2008 Loading Rate 0.5mm/min
ORIGIN® (ORIGIN Dental Systems) Fired at 1460°
MOR
[MPa]
Sample 1
1426
MOR
[MPa]
Sample 1
1423
Young Modulus (stat.)
[GPa]
Sample 1
152
Young Modulus (stat.)
[GPa]
Sample 3
204
Loading Rate 0.5MPa/sec
ORIGIN® (ORIGIN Dental Systems) Fired at 1460°
MOR
[MPa]
Sample 1
1554
Young Modulus (stat.)
[GPa]
Sample 2
185
Determined According to DIN EN 993-5
Date of Testing: February 4th, 2008
Sample
CCS [MPa]
ORIGIN® (ORIGIN Dental Systems) /1 Prefired
90.5
ORIGIN® (ORIGIN Dental Systems) /2 Prefired
162
ORIGIN® (ORIGIN Dental Systems) /3 Prefired
35.7
Mean
96.1
Cylindrical Sample: 24.7mm Diameter and 23.8mm Height
Sample
CCS [MPa]
ORIGIN® (ORIGIN Dental Systems) /1 Fired at 1460°C
1893
ORIGIN® (ORIGIN Dental Systems) /2 Fired at 1460°C
1973
ORIGIN® (ORIGIN Dental Systems) /3 Fired at 1460°C
2321
Mean
2062
Sample Size: : 16x16x20mm
The following pictures show the structure of the sintered bodies using an electron
microscope SEM/EDX (25 kV, spattered with gold).
Picture 3: Sample W 200 (Reference Material from the German Dental Market)
Prefired, Magnification 300X
Picture 4: Sample W 200 (Reference Material from the German Dental Market)
Prefired, Magnification 1000X
Picture 5: Sample Z 200 (Reference Material from the German Dental Market)
Prefired, Magnification 300X
Picture 6: Sample Z 200 (Reference Material from the German Dental Market)
Prefired, Magnification 1000X
Picture 7: Sample ORIGIN® (ORIGIN Dental Systems) Fired at 1460°C.
The size of the ZrO2 grains are 0.5 to 1micron
Microscopic Documentation by SEM on a Sample of ORIGIN®
(ORIGIN Dental Systems) after firing at 1460°C
The picture to the right shows the structure of the ORIGIN® (ORIGIN Dental Systems) sample after firing at 1460°C (to improve the contrast of the cystallites the polished section was thermically etched at 1500°C for 1 hour) using an electron microscope SEM/EDX (25kV, spattered with gold).
