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