PressPress toto Metal Metal lowlow fusefuse porcelainporcelain instructioninstruction manualmanual

11IndiceIndice..

Troubleshooting ……………....….15

Opaque firing chart ………………………14

Firing chart ………………………….…...13

Color combination table …..……….....12

Examples…………… ……………..…..…11

•Stain and glaze …………………..9 - 10

•Margin check and polishing ………….......9

•Porcelain bake ……………………….….8

•Porcelain build up …………………8

•Incisal cut and finishing …………………7

•Sprue cut…………………………………….7

•Investment removal ………………5 - 6

•Pressing cycle… …………………………....5

•Wax burn out ……………...…...4

•Investment……………………………….…..4

•Sprue design ………………..3

•Wax Build up ……………………………....3

•Opaque ……………3

•Metal coping… ………………….....3

•Model and die preparation ………………....3

Practical use …….…………....3

Instruduction ………………….2

The needs of dental laboratories to decrease production The needs of dental laboratories to decrease production time while maintaining natural esthetics and accurate fit time while maintaining natural esthetics and accurate fit have led to the development of this new material enabling have led to the development of this new material enabling the technician to produce restorations meeting these the technician to produce restorations meeting these criteria. Our press to metal ceramic tablets offer both to criteria. Our press to metal ceramic tablets offer both to the specialist and the beginner a product capable of the specialist and the beginner a product capable of replicating the look and beauty of natural teeth replicating the look and beauty of natural teeth bithbithquickly and accurately.quickly and accurately.

Indications and contraindications Indications and contraindications The product and technique are designed for use on single The product and technique are designed for use on single units to three unit bridges over a metal substructure. The units to three unit bridges over a metal substructure. The material can also be used for inlays, material can also be used for inlays, onlaysonlays and veneers.and veneers.

Most alloys suitable for PFM are compatible with the Most alloys suitable for PFM are compatible with the porcelain. The recommended CTE for the alloy is 13.8 porcelain. The recommended CTE for the alloy is 13.8 to 14.4 x 10to 14.4 x 10--6 / 6 / °° C at 25C at 25--500 500 °° C.C.

TheThe AlloyAlloy

22

ModelModelThe model is prepared in the normal manner.The model is prepared in the normal manner.

Metal copingMetal copingSandblast and oxidize the coping according to the manufacturerSandblast and oxidize the coping according to the manufacturer’’s instructions.s instructions.

CeratecCeratec LF LF PressPress overover MetalMetal

Opaque the coping in the normal manner. Using either one coat ofOpaque the coping in the normal manner. Using either one coat of CeratecCeratec Mask opaque and Mask opaque and one coat of the desired shade or two coats of the prescribed shaone coat of the desired shade or two coats of the prescribed shade. Weigh the de. Weigh the opaquedopaquedcoping after completing the process and record the result (W1)coping after completing the process and record the result (W1)CAUTION: Use only CAUTION: Use only CeratecCeratec opaque powders as the LF Press Tab and the technique are opaque powders as the LF Press Tab and the technique are designed specifically for use with this opaque. Other designed specifically for use with this opaque. Other opaquesopaques may run or degrade in CTE may run or degrade in CTE during the process resulting in poor esthetics or a failure of tduring the process resulting in poor esthetics or a failure of the restorationhe restoration

Wax UpWax Up

Wax the complete restoration and then do an incisal cut if desirWax the complete restoration and then do an incisal cut if desired. The restoration must be ed. The restoration must be modeled with a minimum thickness of 0.8mm. CAUTION: use only waxmodeled with a minimum thickness of 0.8mm. CAUTION: use only wax free of ash residue.free of ash residue.

SpruesSpruesThe recommend length for the The recommend length for the spruesprue is 4is 4--5 mm and 3.5mm in diameter. They should be 5 mm and 3.5mm in diameter. They should be attached to the most voluminous part of the crown. Crowns on theattached to the most voluminous part of the crown. Crowns on the occlusalocclusal or or incisalincisal and and inlays in the proximal. The connections must be rounded and the inlays in the proximal. The connections must be rounded and the crown to be injected should crown to be injected should form a line with the form a line with the spruesprue, putting this toward the center with a slight incline outwards, putting this toward the center with a slight incline outwards. When When several objects are injected they should be at the same height. several objects are injected they should be at the same height. Finally, weigh the entire waxed Finally, weigh the entire waxed and and spruedsprued crown and record this value (W2).crown and record this value (W2).

33

InvestmenInvestmenttCAUTION: use only investment recommended for press over metal.CAUTION: use only investment recommended for press over metal.

Investing is done following the investment manufacturerInvesting is done following the investment manufacturer’’s instructions, especially using s instructions, especially using the recommended powder/liquid ratio.the recommended powder/liquid ratio.

Be sure to vibrate during the process to prevent possible air buBe sure to vibrate during the process to prevent possible air bubbles. bbles.

100g or 200g rings may be used depending on the number of crowns100g or 200g rings may be used depending on the number of crowns to be pressed. For to be pressed. For three units bridges, the 200g ring is recommended. three units bridges, the 200g ring is recommended.

Note: For best results, press crowns and inlays in different rinNote: For best results, press crowns and inlays in different rings.gs.

Burn outBurn out

Follow the investment manufacturerFollow the investment manufacturer’’s instructions. Make sure that the pressable s instructions. Make sure that the pressable furnace is located close to the burn out oven.furnace is located close to the burn out oven.

44

Proper number of Press TabProper number of Press TabssFollow the following steps to select the minimum amount of ingotFollow the following steps to select the minimum amount of ingots needed. s needed.

Obtain the total wax used by subtracting the weight of the metalObtain the total wax used by subtracting the weight of the metal coping from the weight coping from the weight of the whole restoration including the metal coping, waxed restoof the whole restoration including the metal coping, waxed restoration and ration and spruessprues ::W2W2--W1W1

Porcelain ingots needed= wax value (W2Porcelain ingots needed= wax value (W2--W1) X 1.2W1) X 1.2The result MUST be rounded UP to the nearest higher number. ThusThe result MUST be rounded UP to the nearest higher number. Thus if the value is 1.2 or if the value is 1.2 or 1.8, you will use two ingots.1.8, you will use two ingots.

PressingPressingPreheat plunger in the same oven during the burn out. Do not prePreheat plunger in the same oven during the burn out. Do not preheat the Press Tab. Remove heat the Press Tab. Remove the ring from the burnout and place into the pressing furnace. Qthe ring from the burnout and place into the pressing furnace. Quickly place the plunger and uickly place the plunger and the Press Tab and the pressing cycle.the Press Tab and the pressing cycle.

Once the pressing is complete, allow the ring to cool down to roOnce the pressing is complete, allow the ring to cool down to room om temperature.temperature.

Mark with a red pen using the plunger as a guide.Mark with a red pen using the plunger as a guide.

Pressing programPressing program::Entry temp. Heat rate Final temp. Hold Re PresEntry temp. Heat rate Final temp. Hold Re Press Cooling s Cooling

14001400ººF 80F 80ººF/min 1450F/min 1450ººF 7:00min 8:00min 5.00 F 7:00min 8:00min 5.00 760760ººC 44C 44ººC/min 788C/min 788ººCC

Pressing pressure: 4.5 barsPressing pressure: 4.5 bars..

55

DivestingDivestingUse a saw or a disc for cutting the investment. Then, using a meUse a saw or a disc for cutting the investment. Then, using a metal spatula, separate tal spatula, separate into two pieces. into two pieces.

Use a fine grain aluminum oxide of 110 microns.Use a fine grain aluminum oxide of 110 microns.

Use 3.5 bar pressure until the restoration can be seen. Reduce tUse 3.5 bar pressure until the restoration can be seen. Reduce the pressurehe pressureto 2 bar and continue with the sandblasting process.to 2 bar and continue with the sandblasting process.Remove all of the investment from the restoration.Remove all of the investment from the restoration.

CAUTION: When pressing inlays, it is recommendable to sandblast CAUTION: When pressing inlays, it is recommendable to sandblast with 50 micron with 50 micron glass beads.glass beads.

66

Cut OffCut Off

Cut off the Cut off the spruesprue with a diamond disc.with a diamond disc.

First: trace a slight path with the diamond disc around the partFirst: trace a slight path with the diamond disc around the part you are going to cut.you are going to cut.

Second: start cutting from only one side and continue to cut thrSecond: start cutting from only one side and continue to cut through the ough the spruesprue. . Do not do this cut close the restoration.Do not do this cut close the restoration.

CAUTION: Use a wet foam to remove heat from the process to preveCAUTION: Use a wet foam to remove heat from the process to prevent breakage of nt breakage of the restorationthe restoration

FinishingFinishing

Remove excess porcelain with a stone and prepare the incisal cutRemove excess porcelain with a stone and prepare the incisal cut if desired.if desired.

Finish using a diamond at low speed over the surface of the restFinish using a diamond at low speed over the surface of the restoration, also oration, also being sure to remove any remaining the investment.being sure to remove any remaining the investment.

Wash using ultrasonic or steam but do not use soap or detergentsWash using ultrasonic or steam but do not use soap or detergents..

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Porcelain build upPorcelain build up

If an If an incisalincisal cut back has been done and cut back has been done and incisalincisal porcelain is to be added, or if porcelain is to be added, or if any dentine correction is necessary, use only any dentine correction is necessary, use only CeratecCeratec low fuse veneering low fuse veneering porcelain. porcelain.

Fire the veneering porcelain according the firing chart .Fire the veneering porcelain according the firing chart .

See the Color Combination Table for recommended See the Color Combination Table for recommended incisalsincisals

88

Check margins and make corrections with Check margins and make corrections with nusingnusing a diamond bu.a diamond bu...

Glazing: Glazing: Clean the restoration prior to glaze application. Use only Clean the restoration prior to glaze application. Use only CeratecCeratec low fuse glazelow fuse glazepowder or spray (recommended). powder or spray (recommended). Use Use CeatecCeatec stains if desired for shade adjustment or characterization.stains if desired for shade adjustment or characterization.It is recommend to stain and then glaze in two bakes, allowing tIt is recommend to stain and then glaze in two bakes, allowing the glaze to protect he glaze to protect the stains during the life of the restoration.,the stains during the life of the restoration.,

99

Crown ready without glazing.Crown ready without glazing.

Crown ready with stain and glaze.Crown ready with stain and glaze.

1010

OtherOther casescases 1111

COLOR COMBINATION TABLE

1212

Opaque CERATEC

A0

A1

A2

A3

A3.5

A4

B0

B1

B2

LF Press Tabs

A0

A1

A2

A3

A3.5

A4

B0

B1

B2

LOW FUSE INCISAL

Clear

Clear

Extra Light

Light

Light

Dark

Clear

Clear

Extra Light

Opaque CERATEC

B3

B4

C1

C2

C3

C4

D2

D3

D4

LF Press Tabs

B3

B4

C1

C2

C3

C4

D2

D3

D4

LOW FUSE INCISAL

Light

Light

Light

Medium

Medium

Dark

Clear

Extra Light

Light

VENEERING PORCELAIN FIRING CHARTVENEERING PORCELAIN FIRING CHART

0:00 0:00 minminCoolCool timetime

1:30 1:30 minminHoldHold timetime

799799ººCC14701470ººFFFiringFiring temperaturetemperature

799799ººCC14701470ººFFVacuumVacuum stopsstops

371371ººCC700700ººFFVacuumVacuum startsstarts

3636ººCC//minmin6565ººFF//minminHeatHeat raterate

5:00min5:00minDryDry outoutDentinesDentines andand IncisalsIncisals

0:00 0:00 minminCoolCool timetime

0:15 0:15 minminHoldHold timetime

799799ººCC14701470ººFFFiringFiring temperaturetemperature

No No vacuumvacuumVacuumVacuum stopsstops

No No vacuumvacuumVacuumVacuum startsstarts

5656ººCC/min/min100100ººFF/min/minHeatHeat raterate

5:00min5:00minDryDry outout

GlazeGlaze andand StainsStains

1313

Opaque firing chart

1414

FIRING CHART

Palette Paste Opaque powder

Dry out 7 min 3-5 min

482°C 593°C Insertion 900°F 1100°F

50°C 50°C Heat rate ° / min. 90°F 90°F

482°C 593°C Vacuum start 900°F 1100°F

954°C - 966ºC

954°C - 966ºC

Vacuum stop 1750°F - 1770ºF

1750°F - 1770ºF

960°C - 971ºC

960°C - 971ºC

Firing temperature 1760°F - 1780ºF

1760°F - 1780ºF

Hold time 0 0

Cool time 0 0

Final texture of the oapque Egg shell -glossy Egg shell -glossy

Thikcness (approx) 0.1-0.3 mm 0.1-0.3 mm

Use only wax free of ash. Possible contamination with the waxStains in the porcelain

Use low speed during cutting and grain fine bursKeep the restoration wet during cutting with the aide of a foam.

High speed cut.Broken ceramic after cutting the sprues.

Remove the cylinder after the program is complete and alloow to drop to room temperature before cutting it.

Fast cool down of the cylinder.Broken ceramic before cutting the sprues.

Check the weight of the wax model and re calculate the number of ingots needed.Check the furnace calibration.Increase final temperature 10-20ºC.

Not enough Press TabsLow furnace temperature Low pressing time

Injection is not completed

Follow instructions of manufacturer during the mix of the investment and the liquid. Any variation affects the thermal expansion of the investment creating cracks during and after the process.During the pressing always use the appropriate base for positioning the cylinder in the center of the furnace tray.

Check powder/liquid ratio Check the alignment between the cylinder and plug before starting the process .

Cylinder is broken after injection

SolutionCausesProblem