Dentsply Sirona CEREC Zirconia meso Processing Instructions

Brand: Dentsply Sirona

Model: CEREC Zirconia meso

Type: Processing Instructions

Dentsply Sirona CEREC Zirconia meso blocks are designed for manufacturing customized, directly screw-retained crowns and partially reduced crowns. These crowns are attached to a suitable titanium base after the milling/grinding and sintering processes. The translucent blocks allow for producing highly esthetic implant-supported crowns. The material’s characteristics include remarkable strength, corrosion resistance, and biocompatibility.

New as of:

02.2018

CEREC Zirconia meso

Zirconium oxide ceramic blocks for Sirona CAD/CAM

systems

Processing instructions: Manufacture of individually

designed directly screw-retained crowns on Sirona TiBase

English

Table of contents Dentsply Sirona

Processing instructions CEREC Zirconia meso

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Table of contents

1Introduction ............................................................................................................. 4

1.1 Dear Customer,............................................................................................ 4

1.2 Contact information...................................................................................... 4

1.3 Copyright...................................................................................................... 4

2General data ........................................................................................................... 5

2.1 Certification .................................................................................................. 5

2.2 Structure of the document............................................................................ 5

2.2.1 Identification of the danger levels .................................................. 5

2.2.2 Formats and symbols used............................................................ 5

2.3 Other relevant documents............................................................................ 6

3Scope of supply ...................................................................................................... 7

4Material ................................................................................................................... 8

5Chemical composition............................................................................................. 9

6Technical data ........................................................................................................ 10

7Intended use, indications and contraindications, and important processing

restrictions............................................................................................................... 11

7.1 Intended use ................................................................................................ 11

7.2 Indications.................................................................................................... 11

7.3 Contraindications ......................................................................................... 11

7.4 Important processing restrictions ................................................................. 12

8Creating the restoration .......................................................................................... 13

8.1 Scanning, designing and milling/grinding..................................................... 13

8.2 Design information ....................................................................................... 14

8.3 Rework of the grounded/milled restoration .................................................. 15

8.4 Drying before sintering................................................................................. 15

8.5 Sintering....................................................................................................... 16

8.6 Additional notes: procedure after sintering .................................................. 18

8.7 Rework......................................................................................................... 18

8.8 Veneer ......................................................................................................... 19

8.9 Polishing ...................................................................................................... 19

8.10 Painting and coating .................................................................................... 19

9Recommended tools and materials ........................................................................ 21

Dentsply Sirona

Processing instructions CEREC Zirconia meso

Table of contents

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10 Glue the directly screw-retained crown onto the titanium base .............................. 22

11 Seal the screw channel........................................................................................... 23

12 Information for the dentist ....................................................................................... 24

12.1 Sterilization .................................................................................................. 24

12.2 Application in the mouth............................................................................... 24

1 Introduction

1.1 Dear Customer,

Dentsply Sirona

Processing instructions CEREC Zirconia meso

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1Introduction

1.1 Dear Customer,

Thank you for purchasing the Dentsply Sirona product CEREC Zirconia

meso.

CEREC Zirconia meso blocks are intended for use in manufacturing

individually designed, directly screw-retained crowns and partially

reduced, directly screw-retained crowns, which are glued to a fitting

titanium base after milling/grinding and sintering.

Improper use and handling can create hazards and cause damage.

Please therefore read and follow these operating instructions carefully.

Always keep them within easy reach.

Also pay attention to the safety instructions in this document to prevent

personal injury and material damage.

Please also observe the instructions provided by the manufacturer of

the titanium base or the implant.

Your

CEREC Consumables Team

1.2 Contact information

Manufacturer's address Sirona Dental Systems GmbH

Fabrikstrasse 31

64625 Bensheim

Germany

Tel.: +49(0) 6251/16-0

Fax: +49(0) 6251/16-2591

e-Mail: [email protected]

www.dentsplysirona.com

1.3 Copyright

Dentsply Sirona

Processing instructions CEREC Zirconia meso

2 General data

2.1 Certification

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2General data

Please read this document completely and follow the instructions

exactly. You should always keep it within reach.

Original language of the present document: German.

2.1 Certification

CE mark

0123

The CEREC Zirconia meso product bears the CE mark in accordance

with the provisions of Council Directive 93/42/EEC of June 14, 1993

concerning medical devices.

For the USA only

CAUTION: Federal law (USA) restricts sale of this device to or on the

order of a physician, dentist, or licensed practitioner.

2.2 Structure of the document

2.2.1 Identification of the danger levels

To prevent personal injury and material damage, please observe the

warning and safety information provided in these operating instructions.

Such information is highlighted as follows:

DANGER

An imminent danger that could result in serious bodily injury or death.

WARNING

A possibly dangerous situation that could result in serious bodily

injury or death.

CAUTION

A possibly dangerous situation that could result in slight bodily injury.

NOTICE

A possibly harmful situation which could lead to damage of the

product or an object in its environment.

IMPORTANT

Application instructions and other important information.

Tip: Information for simplifying work.

2.2.2 Formats and symbols used

The formats and symbols used in this document have the following

meaning:

2 General data

2.3 Other relevant documents

Dentsply Sirona

Processing instructions CEREC Zirconia meso

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Prerequisite

1. First action step

2. Second action step

➢ Alternative action

Result

➢ Individual action step

Prompts you to do something.

See “Formats and symbols

used [→5]”

Identifies a reference to another text

passage and specifies its page num-

ber.

● List Designates a list.

“Command / menu item” Indicates commands, menu items or

quotations.

2.3 Other relevant documents

● Operating instructions for titanium bases and implants,

● Operating instructions for the consumables used during application,

● User manual for the software used (e.g. CERECSW,

CERECPremiumSW, inLabSW),

● Operating instructions for the sintering furnace used (e.g. CEREC

SpeedFire, inFireHTC and inFireHTC speed).

Dentsply Sirona

Processing instructions CEREC Zirconia meso

3 Scope of supply

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3Scope of supply

CEREC Zirconia meso blocks are each available in four different classic

colors (A1, A2, A3, and A3.5) and in two different sizes for connecting to

the titanium base (S and L):

CEREC Zirconia meso S

Product REF Product name

6623016 CEREC Zirconia meso S A1

6582428 CEREC Zirconia meso S A2

6582436 CEREC Zirconia meso S A3

6582444 CEREC Zirconia meso S A3.5

CEREC Zirconia meso L

Product REF Product name

6623024 CEREC Zirconia meso L A1

6582451 CEREC Zirconia meso L A2

6582469 CEREC Zirconia meso L A3

6582477 CEREC Zirconia meso L A3.5

The blocks feature identical dimensions of 24 mm x 23 mm x 21.5 mm

(L x W x H).

4 Material Dentsply Sirona

Processing instructions CEREC Zirconia meso

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4Material

CEREC Zirconia meso ceramics constitute blocks comprised of

translucent zirconium oxide.

The blocks are initially delivered partially sintered; they are then

enlarged with the Sirona CAD/CAM systems for processing as

individual restorations before being densely sintered. In the final step,

the restorations attain their final size and geometry through shrinkage.

The aesthetic features of CEREC Zirconia meso enable application as

implant-supported fully anatomical crowns.

The advantages of CEREC Zirconia meso include:

● High strength,

● Resistance to corrosion,

● Good biological compatibility of the product,

● Translucency,

● Coloration of the blocks to match classic tooth colors A1 - A3.5.

Dentsply Sirona

Processing instructions CEREC Zirconia meso

5 Chemical composition

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5Chemical composition

The chemical composition of the zirconium oxide ceramics of CEREC

Zirconia meso is described in the following table:

Component CEREC Zirconia meso

ZrO2+HfO2+Y2O3≥ 99.0%

Y2O3> 4.5% - ≤ 6.0%

HfO2≤ 5 %

Al2O3≤ 0.07%

Other oxides ≤ 1.1%

6 Technical data Dentsply Sirona

Processing instructions CEREC Zirconia meso

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6Technical data

The following specifications apply to material that is densely sintered in

a CEREC SpeedFire, inFire HTC, or inFire HTC speed sintering

furnace.

Density: 6.08 ± 0.2 g cm-3

Fracture toughness KIC 7.1 MPa m1/2

Thermal expansion coefficient (20 - 500 °C): 10.5·10-6 K-1

Bending strength: > 900 MPa

Grain size ≤ 0.4 µm

Chemical solubility < 25 µg/cm2

Colors:

The blocks are available in four different classic colors:

● A1

● A2

● A3

● A3.5

Dentsply Sirona

Processing instructions CEREC Zirconia meso

7 Intended use, indications and contraindications, and important processing restrictions

7.1 Intended use

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7Intended use, indications and

contraindications, and important

processing restrictions

7.1 Intended use

Manufacture of individually designed dental restorations from CEREC

Zirconia meso blocks using Sirona CAD/CAM systems.

CEREC Zirconia meso blocks are intended for use in manufacturing

individually designed directly screw-retained crowns, which are glued to

a fitting titanium base after milling/grinding and sintering.

7.2 Indications

Indications in dentistry areas:

●Directly screw-retained crown: A fully anatomical crown for the front

and lateral tooth area produced via the CAD/CAM process that

already has a drill hole in the block. This crown is glued to a fitting

titanium base after milling/grinding and sintering and then fixed into

the patient's mouth with a screw on an implant.

●Partially reduced directly screw-retained crown: Like a directly

screw-retained crown, but with reduced wall thickness. The partially

reduced crown is veneered with veneering ceramics. The screw

channel for fixing onto the implant is not sealed with veneering

ceramics.

In both versions the screw channel is only sealed in the patient's mouth

using a composite.

Sintering in inFire HTC speed and inFire HTC

Sintering must take place with the pre-programmed Speed and Classic

programs in inCoris TZI / ZI in inFire HTC speed and inFire HTC.

Sintering in CEREC SpeedFire

Sintering must take place with the programs for CEREC Zirconia meso

in the CEREC SpeedFire.

7.3 Contraindications

Contraindications in areas of dentistry:

● Insufficient oral hygiene

● For restorations with angulation correction of more than 20° to the

implant axis

● For individual tooth restorations with free end saddle

● Insufficient space available

● For restorations with a length to implant length ratio of more than

1:1.25

7 Intended use, indications and contraindications, and important processing restrictions

7.4 Important processing restrictions

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7.4 Important processing restrictions

Working successfully with CEREC Zirconia meso cannot be guaranteed

by Dentsply Sirona in the event of a failure to comply with the following

instructions:

● With a directly screw-retained crown the outlet for the screw channel

must not be in the area around the contact points or be on functional

masticatory surfaces. A frame and separate crown is preferred if this

is not possible.

● Failure to observe the manufacturer's instructions for processing

titanium bases and implants.

● No extension links, i.e. exclusively individual tooth supply.

Dentsply Sirona

Processing instructions CEREC Zirconia meso

8 Creating the restoration

8.1 Scanning, designing and milling/grinding

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8Creating the restoration

8.1 Scanning, designing and milling/grinding

Further details on the manufacturing processes for the restorations can

be found in the user manuals for the following software products:

● CEREC SW

● CEREC Premium SW

● inLab SW

1. When working on the model: Plug a titanium base onto the lab

implant of the master model. Plug a scanbody onto this until it

comes to rest on the shoulder of the implant without any gaps. The

scanbody is scannable without powder or scan spray.

For intraoral working: Plug a ScanPost directly onto the implant.

Plug a scanbody onto this until it comes to rest on the shoulder of

the implant without any gaps. The scanbody is scannable without

powder or scan spray.

2. Scan the situation with a scanner, e.g. inEos Blue, inEos X5 or an

acquisition unit.

3. Design the individual shape of the directly screw-retained crown

with one of the software products CEREC SW, CEREC Premium

SW or inLab SW and mill/grind the shape from a CEREC Zirconia

meso block (see user manual). The following information must be

observed when designing, reworking and sintering zirconium oxide.

IMPORTANT

The manual trim function should be used for optimum results with

CEREC Zirconia meso during the restoration design process using

one of the aforementioned software products. The design proposals

must be reviewed with particular care if the

"Auto Trim"

function is

used. In some cases the thickness of the approximal contacts cannot

be displayed correctly.

8 Creating the restoration

8.2 Design information

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8.2 Design information

AScrew channel

BTitanium base

● Maintain a minimum wall thickness of 0.5 mm circularly around the

screw channel.

● The outlet point for the screw channel should not be in the area

around the contact points to the antagonist wherever possible.

● If the crown is to be reduced and then veneered immediately, make

sure that this does not narrow the screw channel. The connection

point to the adhesive base and the screw channel must not be

changed.

● Make sure that no sharp edges or corners are produced.

● The incisal/occlusal wall thickness of the ceramic above the titanium

base should be at least 1 mm.

● The circular wall thickness above the titanium base should be at

least 1 mm.

Dentsply Sirona

Processing instructions CEREC Zirconia meso

8 Creating the restoration

8.3 Rework of the grounded/milled restoration

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8.3 Rework of the grounded/milled restoration

After the grinding/milling process and prior to sintering, the restoration

must be separated using a carbide milling machine (Dentsply Sirona

recommends: HM489FC 023 from Meissinger).

To prevent milling residues from remaining in the fissures, the

restoration can be briefly steamed off or cleaned with water and a soft

toothbrush.

In the case of dry-milled restorations we recommend that these are

freed from dust using a ceramic brush or compressed air.

Make sure you do not inhale abrasive dusts. Use a vacuum system and

wear a mask.

Block remains and the block holder do not need to be disposed of

separately. They can be disposed of as normal household waste. This

also applies to trepanated restorations.

8.4 Drying before sintering

No drying is required for dry-milled restorations (with no water cooling).

The CEREC software makes a drying program available for the CEREC

SpeedFire furnace for drying restorations.

NOTICE

Prior to sintering in the inFire HTC or inFire HTC speed, restorations

processed with water cooling (wet milling/wet grinding) must be dried

for 10 minutes at 150°C (302°F) in the drying cabinet. Residual

moisture in the material can cause the restorations to burst.

NOTICE

In the case of high humidity

In an environment with a high level of humidity, the restorations can

absorb moisture after drying. For this reason, sintering must take

place within a maximum of one hour after drying.

8 Creating the restoration

8.5 Sintering

Dentsply Sirona

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8.5 Sintering

Restorations made from CEREC Zirconia meso have to be sintered in

dry conditions.

The Sirona inFire HTC, inFire HTC speed and CEREC SpeedFire

sintering furnaces offer programs with a pre-drying function.

In addition the restorations processed with water cooling (wet milling/

wet grinding) must be pre-dried beforehand for 10 minutes at 150°C

(302°F) in the drying cabinet for sintering in the inFire HTC and inFire

HTC speed furnaces.

The sintering process should preferably be performed in a Sirona

sintering furnace.

When sintering in the inFire HTC/HTC speed, use the pre-programmed

inCoris TZI / ZI program.

When sintering in the CEREC SpeedFire, the CEREC software

automatically selects the program. Observe the information in the

operating instructions for the furnace.

The classic program for sintering with CEREC Zirconia meso is the

same as for inCoris TZI / ZI. The sintering result from furnaces other

than those specified here cannot be guaranteed by Dentsply Sirona.

As an alternative, the sintering process can be carried out in the

compatible VITA Zyrcomat or Ivoclar Vivadent Sintramat high

temperature furnaces. Use the following zirconium oxide program for

this.

Sintering program for other furnaces

Heating rate

°C/min

Holding temperature

°C

Holding time

min

25 800 0

15 1510 120

30 200 0

In any case, the details in the manuals for the respective furnaces are to

be adhered to.

Sintering in CEREC SpeedFire

When sintering in the CEREC SpeedFire furnace, place the restorations

with the occlusal surface directly on the top door insulation.

NOTICE

Maximum Observe restoration size

Observe the maximum Furnace chamber size when loading the

furnace.

- Diameter: 38 mm

- Height: 20 mm

The restoration must be placed on the labial surface when sintering if

the restoration exceeds 20 mm (block height 22 mm).

Dentsply Sirona

Processing instructions CEREC Zirconia meso

8 Creating the restoration

8.5 Sintering

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Sintering in inFire HTC or inFire HTC speed

When using an inFire HTC or inFire HTC speed, place the restorations

in the sintering tray with the occlusal surface on the sintering beads.

If several restorations are sintered at the same time, these must not

touch the edge of the sintering tray or each other.

Notes on sintering in an inFire HTC speed from serial numbers 5000

to 5699

NOTICE

Reprogramming heat curves

As a result of a modified component in inFire HTC speed from serial

numbers 5000 to 5699, depending on the local power grid your

furnace may show signs of an increased heating rate. Please

program the following heat curves for CEREC Zirconia meso and use

this or the "classic" program for sintering.

For speed sintering "speed":

On program stations 20 to 26:

Heating speed

°C/min

Holding tempera-

ture

°C

Holding time

min

S4 99 750 0

S3 99 1100 0

S2 50 1510 30

S1 99 800 5

For speed sintering with pre-drying "speed + dry":

On program station 27 or 28:

Heating speed

°C/min

Holding tempera-

ture

°C

Holding time

min

S4 99 750 0

S3 50 1510 30

S2 99 800 5

S1 15 80 30

For speed sintering "speed + air":

On program station 29 or 30:

Heating speed

°C/min

Holding tempera-

ture

°C

Holding time

min

S4 99 750 0

S3 99 1100 0

S2 50 1510 30

S1 99 500 0

8 Creating the restoration

8.6 Additional notes: procedure after sintering

Dentsply Sirona

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8.6 Additional notes: procedure after sintering

In the case of yellow staining of CEREC Zirconia meso restorations

after the sintering process, the high-temperature furnace should be

cleansed by performing an empty run. The details in the manuals for the

respective furnaces are to be adhered to in this case.

This is not necessary for CEREC SpeedFire due to the different heating

concept.

Sintering beads that adhere are to be removed carefully.

After the sintering process, the restorations from CEREC Zirconia meso

blocks must be cooled down to room temperature before further

processing.

8.7 Rework

The surface condition of ceramic materials is decisive for their bending

strength. Reworking sintered restorations with milling tools, especially in

the connector region, must be avoided at all costs.

Corrections to the grounded restoration should be completed if possible

before sintering.

One of the following tools should be used if rework is required in

sintered state:

● Wet grinding turbines (approx. 2.5 bar - 3 bar),

● Rubber polisher (low speed),

● With primary telescopes, a milling device with water cooling and low

grinding pressure,

● Soft diamond rubber polisher (Dentsply Sirona recommends: EVE

DIASYNT PLUS / DIACERA).

Follow the manufacturer's instructions for the tools.

The sintered restorations should also be polished prior to applying the

enamel coating in order to prevent abrasion to the antagonist following

potential loss of shine.

CEREC Zirconia meso can be polished with all standard polishing

agents for zirconia ceramics (Dentsply Sirona recommends: EVE

DIASYNT PLUS / DIACERA). Subsequent heat treatment

(depressurization fire) is not necessary.

NOTICE

Observe usage information

Etching with hydrofluoric acid does not produce a retentive surface.

Silanization is not required

Please observe the information on use of the fastening materials of

the corresponding manufacturers.

Dentsply Sirona

Processing instructions CEREC Zirconia meso

8 Creating the restoration

8.8 Veneer

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8.8 Veneer

The areas of the reduced crowns to be veneered that are made of

CEREC Zirconia meso may not be sandblasted or reworked.

Sandblasting could lead to an undesirable phase transformation of the

zirconium dioxide.

For the veneer, this would cause complex diffusions of stress along the

interface which might lead to cracks or late cracks in the veneer after

the restoration is inserted.

Make sure that the screw channel is not narrowed when the veneering

ceramics is applied. The connection point to the adhesive base and the

screw channel must not be changed.

Reduced crowns made of CEREC Zirconia meso can be veneered with

veneering ceramics for zirconium oxide ceramics (Dentsply Sirona

recommends: Cercon® Ceram Kiss from Dentsply Sirona).

In this case the manufacturer's processing instructions must be

observed without fail.

8.9 Polishing

The sintered restorations should also be polished prior to applying the

enamel coating in order to prevent abrasion to the antagonist following

potential loss of shine.

Restorations made from CEREC Zirconia meso can be polished with

rubber polisher (Dentsply Sirona recommends: EVE DIASYNT PLUS /

DIACERA) for processing zirconium oxide. Subsequent heat treatment

(depressurization fire) is not necessary.

8.10 Painting and coating

Restorations made from CEREC Zirconia meso can be finalized using

paints for zirconium oxide ceramics. Celtra Universal Stain from

Dentsply Sirona is suitable for this purpose. In this case the processing

instructions for the relevant product must be observed without fail.

Restorations made from CEREC Zirconia meso blocks can be finalized

using glazes for zirconium oxide ceramics. CEREC SpeedGlaze from

Sirona and Celtra Universal Stain & Glaze from Dentsply Sirona are

suitable for this purpose.

NOTICE

No glaze on/in the adhesive area/screw channel

No glaze must under any circumstances get onto the adhesive area

for the restoration to the titanium base or into the screw channel as

this impairs the fit.

8 Creating the restoration

8.10 Painting and coating

Dentsply Sirona

Processing instructions CEREC Zirconia meso

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The following step-by-step instructions illustrate the glazing process

using the CEREC SpeedFire furnace as an example.

1. Always use a slim restoration holder wherever possible for glazing

restorations which does not touch the inner surfaces when glazing.

Use the "Glasur Support Single Unit" restoration holder from Sirona.

2. Use the CEREC SpeedPaste from Sirona for fastening onto the

restoration holder and for closing the screw channel.

3. Press the thinnest tapered pin into the screw channel filled with

CEREC SpeedPaste.

4. Spread/model the CEREC SpeedPaste in such a way that the

screw channel is sealed and the adhesive surface to the TiBase is

covered and no glaze/spray can get onto these surfaces.

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Dentsply Sirona CEREC Zirconia meso Processing Instructions

Dentsply Sirona CEREC Zirconia meso Processing Instructions

Dentsply Sirona CEREC Zirconia meso Processing Instructions

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