Date post: | 26-Mar-2015 |
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Van Thompson DDS
Petra Guess
IPS e.max CAD Lithium Disilicate StudyIPS e.max CAD Lithium Disilicate StudyIPS e.max CAD Lithium Disilicate StudyIPS e.max CAD Lithium Disilicate Study
Single crowns made of IPS e.max lithium disilicate can be…
3X3X STRONGER STRONGER
than a Zirconia single unit crowns!
Buccal Lingual cusp loaded increasing cyclical load every 10k cycles until failure
Bottom Radial Crack
Use Level Probability Lognormal
Std=0.08; Alpha(0)=10.10; Alpha(1)=0.24
Cycles
Unreliabilit
y
10000 10000001000001.00
5.00
10.00
50.00
99.00Use LevelCB@90% 2-Sided
Emax Ceram HandL Y-TZPCumulative DamageLognormal200 N LoadF=17 | S=1
Data PointsUse Level LineTop CB-I
Fatigue Zirconia supported / Press-on
300 N 50 K
200 N 40 K
LoadLoad
Fatigue IPS e.max CAD Lithium Disilicate Survivor at 900 N and 180 K cycles (profile I)
Fatigue IPS e.max CAD Lithium Disilicate Survivor at 900 N and 180 K cycles (profile I)
Only superficial damage at load surface
• No Cracks - only superficial surface damage
• Specimens were tested up to 900 N of force with 180,000 cycles and no cusp shearing !
• No Cracks - only superficial surface damage
• Specimens were tested up to 900 N of force with 180,000 cycles and no cusp shearing !
IPS e.max CAD Lithium Disilicate
Biaxial mouth motion step stress fatigue
IPS e.max CAD Lithium Disilicate
Biaxial mouth motion step stress fatigue
Survival of test materials based on Load and Number of Cycles
0 200 400 600 800 1000
Lithium Disilicate
Zirconia pressed
Zirconia veneered
Cro
wn
s
Load (N) and cycles per thousand
Load cycles (x 1000)
“This is by far the most robust system we have tested to date”
Van Thompson DDS
IPS e.max CAD Lithium DisilicateIPS e.max CAD Lithium Disilicate