van thompson dds petra guess ips e.max cad lithium disilicate study
TRANSCRIPT
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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
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Single crowns made of IPS e.max lithium disilicate can be…
3X3X STRONGER STRONGER
than a Zirconia single unit crowns!
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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
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Fatigue Zirconia supported / Press-on
300 N 50 K
200 N 40 K
LoadLoad
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Fatigue IPS e.max CAD Lithium Disilicate Survivor at 900 N and 180 K cycles (profile I)
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Fatigue IPS e.max CAD Lithium Disilicate Survivor at 900 N and 180 K cycles (profile I)
Only superficial damage at load surface
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• 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
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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)
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“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
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