D-MAX Zirkonio

1. Scanning (Delcam option)

DMAX

M Ma ax x h he ea at ti in ng g r ra at te e : : 1 10 00 0 / /m mi in n, , M Ma ax x T Te em mp p : : 1 16 60 00 0

3. Sintering (Microwave sintering furnace)

1500 3h by conventional furnace 1500 5 min by microwave furnace1500, 3h by conventional furnace 1500, 5 min by microwave furnacesmaller grains and less pores compared with conventional furnace

3. Sintering (Microwave sintering furnace)Microwave furnaceMicrowave furnace Conventional furnaceConventional furnace

Heating rateHeating rate ~ 100 /min ~ 5 /min

Maximum temp.Maximum temp. 1600 1600

Retention timeRetention time Less than 30 minutes More than 2 hoursRetention timeRetention time Less than 30 minutes More than 2 hours

Particle sizeParticle sizeVery fine grains

(rapid heating & short time sintering)Grain growth

(long time sintering)(rapid heating & short time sintering) (long time sintering)

DensityDensity Fine structure Pore remainsStrengthStrength Stronger than conventional (~1.2) 1gg g ( )

Furnace sizeFurnace size 1/10 vs. conventional 1

4. Zirconia block manufacturing process

Binder

Manufacturing process planning Base powder Press CIP Pre-sintering

* CIP (Cold Isostatic Pressing)

Furnace

PressSpray Dryer

5. DMAX Zirconia block

High density Less pore

More translucent Harder High fracture toughnessLess pore

Uniform particle size High fracture toughness Aging property No shrinkage difference

(MPa) (MPa.m1/2)

810

Toughness

12001400

Bending strength

2468

400600800

10001200

00200

Strength and toughness test of DMAX sintered zirconia block in accordance with ISO 6872

5. DMAX Zirconia block

High density Less pore

More translucent Harder High fracture toughnessLess pore

Uniform particle size High fracture toughness Aging property No shrinkage difference

Aging test

1000

2000 ISO13356maximum amount of monoclinic phase after < 25%

00 year 5year 10year 40year

accelerated aging

residual biaxial flexureh

> 500 MPa, and dstrength decrease not more than 20 %

Aging test of DMAX sintered zirconia block in accordance with ISO 13356

Sample shape5. DMAX Zirconia block Sample shapeA1 T1 K1 K2 K3 Shape

Diameter 19 78 19 32 20 00 19 98 19 99() 19.78 19.32 20.00 19.98 19.99 DT

Thickness() 0.965 0.849 0.863 0.858 0.857

T

Diameter measured using Mytutoyo cop calipers Thickness measured using Mytutoyo cop Micrometer

K1, K2, K3 : DMAX blockT1 : Tohso blockA1 : cercon block

5. DMAX Zirconia block

Transmittance Data0.6

K3K2

0 4

0.5

T1

K1

0.3

0.4

%

T

A1T1

0 1

0.2

200 300 400 500 600 700 800 9000.0

0.1

Wavelength (nm)