Indications

zirconia

I. Introduction
CeraDirect Zirconia has 4 shapes available:OPEN SYSTEM (98MM)、AG SYSTEM (92*75MM)、ZIRKONZAHN SYSTEM (95MM)、SIRONA SYSTEM. Suitable for CeraDirect Zirconia HT (High Translucent) & UT(Ultra Translucent)&SHTC(Super High Translucent Pre-shaded)&SHTML(Super High Translucent Multilayer)&MAX(Max Aesthetic Multilayer ). Please refer to your milling system’s technical instructions for correct machine operation. CeraDirect Zirconia HT、UT、SHTC、SHTML、MAX. Open system (98MM)、Amann Girrbache system (92 * 75MM)、ZrikonZahn system (95 mm). has nine available thicknesses: (12mm、14mm、16mm、18mm、20mm、22m、25mm、28mm、30mm). CeraDirect Zirconia SHTC, SHTML, UTML have sixteen color variations: (A1、A2、A3、A3.5、A4、B1、B2、B3、B4、C1、C2、C3、C4、D2、D3、D4). CeraDirect Zirconia SIRONA SYSTEM has six available size: (20*15*19MM 、40*15*19MM、55*15.5*19MM、65*25*22MM 、 65*40*22MM 、 85*40*22MM) and has sixteen shade variations: (A1、A2、A3、A3.5、A4、B1、B2、B3、B4、C1、C2、C3、C4、D2、D3、D4). CeraDirect Zirconia are recommended for use in fabricating Full Contour Zirconia restorations or the frameworks.
II. Intended Use
CeraDirect Zirconia is used for the fabrication of the all-ceramic restorations (frameworks, Full Contour Zirconia bridges, inlays, onlays and veneers).
III. Sintering Program

Starting 
temperature

Heating
rate
℃/min
Burning
temperature

Heating
rate
℃/min
Burning
temperature

Heating
rate
℃/min
Burning
temperature

Holding
time
min
Cooling
rate
℃/min
HT,SHTC
1-5units
20℃10℃/min300℃17.5℃/min1000℃4℃/min1530℃120min12.2℃/min
HT,SHTC
1-5units
20℃10℃/min300℃11.6℃/min1000℃3.5℃/min1530℃150min5.9℃/min
Heating
rate
℃/min

Burning
temperature

Holding
time
min

Heating
rate
℃/min

Burning
temperature

Heating
rate
℃/min

Burning
temperature

Holding
time
min

Cooling
rate
℃/min

UT,MAX,
SHTML
8℃/min1200℃30min2℃/min1300℃3.6℃/min1480℃120min8℃/min

IV. Composition
ZrO2, Y2O3 etc.
V. Physical Properties
Coefficient of Thermal Expansion (25-500℃ (77-932°F)): 9.9(±0.2)×10-6/K
VI. Directions for Use
(1) Take the disc from the packaging and confirm that the disc does not have a crack or other damage.
(2) Place the disc into the milling machine; then begin the milling process following the milling systems technical instructions.
(3) After milling, remove the restorations from the disc with a diamond bur etc.
(4) The cutting waste or dust, which is attached to the restorations, can be removed with a gentle air stream.
(5) Put the restorations into the refractory sagger tray and place them in the sintering furnace.
(6) Sinter the restorations according to the sintering schedule shown above. (III. Sintering Program).
(7) After sintering, adjust the restorations with a diamond bur as needed.
(8) Confirm that the restorations have no cracks.
(9)-1 Full Contour Zirconia:
    a) Glaze baking: Create a high shine surface by polishing, especially on the contact areas then apply the glaze on all surfaces in the usual manner.
    b) Hand polishing: Create a high shine surface on the entire restoration by polishing without using the glaze.
VII. Remarks on Handling
Caution:

1. When milling the disc, use an approved dust mask and vacuum with air filter to protect your lungs from inhaling dust.
2. When milling the disc, use safety glasses to prevent the dust from getting into your eyes. If the dust gets into your eyes, immediately rinse with copious amounts of water and consult a physician.
3. Do not use for any purposes except for restoration.
4. Do not touch the items heated by the furnace with your bare hands.
Caution in conjunction with usage:
1. Do not use the disc if there is a crack noticed after removing it from the package.
2. Dry milling is recommended. If wet milling is used, the translucency of the disc may be reduced.
3. If you find a crack in the restorations, do not use.
4. The above sintering recommendation is only a guideline; some adjustments may be required depending on each individual furnace.
5. When milling the disc, do not bring the milling bar into contact with the plastic ring to prevent detachment of the disc.
6. Cut and remove the plastic ring prior to sintering the whole disc.
Storage:
1. Store in a cool and dry place. Keep away from direct sunlight.
2. The product should be stored at 0-50℃ (32-122°F).
3. Do not remove the disc from its packaging during storage.
4. The disc is fragile, and requires care when handling.
5. The product must be used by the expiration date indicated on the package.
[WARRANTY]
CeraDirect. will replace any product that is proven to be defective. Before using, the user shall determine the suitability of the products for the intended use and the user assumes all risk and liability whatsoever in connection therewith.

lithium disilicate

Lithium disilicate blocks
Description

CeraDirect lithium disilicate material contain a tried-and-tested lithium disilicate glass-ceramic (CAM block) and Press Casting Ingot for the fabrication of fixed anterior and posterior restorations.
Intended use
All-ceramic material for dental use
Types of restorations:
– Veneers
– Inlays
– Onlays (e.g. occlusal veneers, partial crowns)
–Crowns
– Three-unit bridges up to the second premolar as the terminal abutment (only CAM block)
 I. CeraDirect lithium disilicate glass-ceramic (CAM block)
CAM block can be processed in an CAD/CAM machine in the intermediate crystalline state. After wet-processing of the block, the restoration is crystallized in a crystallizing furnace.
Due to the resulting change in the microstructure, a flexural strength of ≥ 375 Mpa and the respective optical properties are achieved. 
a. Limitations of use
– Inlay, cantilever and Maryland bridges
– Width of the pontic: anterior region > 11 mm, premolar region > 9 mm
– Complete veneering of molar crowns
– Any other uses that are not included in the range of applications
b. Processing restrictions
Failure to observe the following information will compromise the results
– Falling short of the required minimum thicknesses
– Milling of the blocks in a non-compatible CAD/CAM system
– Crystallization in a non-calibrated ceramic furnace
c. System requirements
CAM block must be processed with an authorized CAD/CAM system.
d. Side effects
There are no known side effects to date. 
e. Preparation
Prepare the tooth based on the guidelines for all-ceramic restorations and make sure to observe the minimum layer thicknesses:
– No angles or sharp edges
– Shoulder preparation with a rounded internal angle and/or pronounced chamfer
– The thickness of the edge of the preparation, particularly in anterior teeth, must be at least 1.0 mm in order to ensure optimum processing in the CAD/CAM machine.
f. Finishing
Observe the grinding instrument recommendations 4 and the minimum and minimum layer thicknesses when finishing and contouring the ceramic structures. Adjustments by grinding should be carried out while the restoration is still in the pre-crystallized (blue) state, at low speed and exerting only light pressure to prevent delamination and chipping at the margins. Overheating of the ceramic must be avoided. Smooth out the attachment point of the block, paying particular attention to the proximal contacts. If required, carry out individual shape adjustments. Finish the functional areas (occlusal contact surfaces) of the restoration with a fine diamond to smooth out the surface structure created by the CAD/CAM process. Do not “post-separate” bridge framework connectors. This may result in undesired predetermined breaking points, which will subsequently compromise the stability of the all-ceramic restoration. If desired, the restoration can be carefully tried in intraorally in the blue state in order to adjust the occlusion/articulation. Always clean the restoration either with ultrasound in a water bath or with the steam jet before crystallization. Make sure that the restoration has been thoroughly cleaned and any milling additive residue of the CAD/CAM machine has been removed before further processing it. Residue of the milling additive remaining on the surface may result in bonding problems and discolouration. The restoration must not be blasted with Al2O3or glass polishing beads.
g. Fixing the restoration on an Crystallization Pin
1. Select the High temperature Crystallization Pin
2. Subsequently, fill the inside of the restoration with Ceradirect firing glue up to the restoration margin.
3. Press the selected Crystallization Pin deeply into the Ceradirect firing glue so that it is adequately secured.
4. Prevent contamination of the outer restoration surface. Clean off any possible contamination with a brush dampened with water and then dry.
Important: For crystallization restorations must not be placed directly on the sintering Tray without auxiliary firing glue areas to a high-gloss finish.
Crystallization program

Furnaces
Programat
Stand—by
tempeiasure
Closing time
S[min]
Heating fate
T1[℃/℉/min]
Firing tempeature
T2[℃/℉]
Holding time
H2[min]
Long-tem cooling
L[℃/℉]
Cooling rate
[℃/℉/min]
450/8576:0060/108850/15625:00700/12920

Lithium disilicate Press ingots

Ceradirect lithium disilicate Press ingots are for the Press technology. They demonstrate a strength of 425 MPa (typical average value). The ingots are pressed to restorations with outstanding accuracy of fit in anyother press furnaces. The pressed, tooth-coloured, highly esthetic restorations are stained and glazed with ceradirect glaze paste.
Pressing(e.g. using Ivoclar vivadent Programat EP 5010 press furnace)
Carry out the following preparatory steps for pressing before the preheating cycle for the investment ring has been 
completed:
– Provide a cold Plunger a cold ceradirect press ingot in the desired shade.
− Turn on the press furnace (e.g. Programat EP 5010) in time so that the self-test and preheating phase are completed.
– Select the press program below **.
– Remove the investment ring from the preheating furnace immediately after completion of the preheating cycle
− Place the cold ceradirect press ingot into the hot investment ring, Then position the cold Plunger and in the investment ring.
– Place the loaded investment ring in the centre of the preheated press furnace.
− Press START to start the selected program below.
Crystallization program

Furnaces
Programat
Stand-by
tempeiasue
Heating fate
T1[℃/min]
Firing tempeature
T[℃]
Holding time
H[min]
End
μm/min
100g7006092015:00300
200g7006092525:00250