MERZ DENTAL CreaPRINT Cast Dental Resin Instruction Manual

: June 3, 2024
: MERZ DENTAL

Table of Contents

Intended purpose
Composition
Physical data
CAM processing
Post-processing
Disposal
Warnings
Documents / Resources

CreaPRINT Cast
UV-curable resin based on acrylate for additive manufacturing
Instructions for use, please read carefully!

Intended purpose

Liquid acrylate mixture for additive fabrication of parts with pressing and casting technology in dentistry using tub-based photopolymerisation at 385 nm.

Composition

Diurethane dimethacrylate, Mix of isomers (UDMA)
2-[[(butylamino)carbonyl]oxy]ethyl acrylate
Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO)
Propoxylated glycerol triacrylate
Mequinol
Colourants

Symbols

REF	Article number
LOT	Batch
Use by
Colour
Wavelength
Protect from the sun
Observe Instructions for use (IfU)
****	Safety notes in the IfU
eLFU	Reference to an electronic Instructions for use with link to the

download area
| Manufacturer

Physical data

Property	Value	Test method

Acrylate mixture
Viscosity| 1000 ± 200 mPa-s| ISO 3219 (23 °C, 5 —100 s-1)
End product
Flexural strength| > 80 MPa| ISO 178
Modulus of elasticity| 2900 ± 200 MPa| ISO 178
Glass transition| 86 °C| ISO 11357
Ash content| < 1,0 %| ISO 3451-1*

*based on

CAM processing

Use the correct printer / material combination. Released parameter sets are available for download at www.merz-dental.de
The material is designed for layer thicknesses / slices of 50 μm and 100 μm.
To avoid dimensional errors in the z-axis, it is recommended to use support structures to place the design on a base plate with a perforated pattern, e.g. a hexagonal grid.
A design aligned parallel to the construction platform has a lower printing time than a vertically aligned one, due to the lower number of layers, but this also
requires significantly more support structures, which must be manually removed and cleaned in post-processing. It is recommended to angle the designs between 30° and 90°.
The use of predetermined breaking points / tapering of the supports towards the component is recommended, as this reduces the risk of damaging the surface when removing the supports.
When positioning the supports, make sure that overhangs are supported and, wherever possible, fitting surfaces are not pinned to minimise reworking.
Additive fabrication on a 3D-printe r
Use the parameter set corresponding to the material.
For printing, use the same layer thickness as in CAM planning, otherwise inaccuracies in fit and / or misprints may occur.
Ensure clean work. Contamination, especially at the optical window to the projector and at the material tub (vat), can cause errors on the printed part or misprints.
When filling the material tub, make sure that the material is exposed to ambient light as briefly as possible and that the filling level markings are observed.
The further procedure, as well as the operation of the printer, are described in the associated manual.
After printing, the design should remain suspended in the printer for 10 minutes to allow excess print material to drip off the surface. This saves material and prolongs the service life of the cleaning fluid.

Post-processing

Post-processing should be performed immediately after completion of printing to minimise the risk of contamination and unwanted polymerisation of material still present on the surface.

Process step	Time required [min]
1	Allow the design still in the printer after the printing process has been
completed to drip off.	10
2	Remove construction platform, remove design and carefully cut off
supports.	5
3	Clean the design in a closed container with propan-2-ol; isopropanol

cleaning fluid (a’ 99%) for 5 minutes in an ultrasonic bath.
Note: Do not heat the design in the cleaning solution and do not leave it in the solution for a long period.| 5
4| Use a pair of tweezers to remove the printed part from the cleaning fluid, blow it off with compressed air if necessary, and let it dry.
Recommendation: Dry the design in an oven at 40 °C.
Note: Residues of the alcoholic cleaning fluid on the surface lead to a softer and sometimes scratch-sensitive surface after post-airing.| 30
5| Post-curing of the design in the Otoflash G171 light curing device with 2 x 2400 flashes – tum the design between the two cycles. Recommendation: Use the nitrogen (protective gas) function, as this minimises oxygen inhibition and thus leads to improved surface and material properties.
Observe the manufacturer’s specifications for the device.| 8
6| Manual post-processing, e.g. cleaning of the supports and polishing with commercially available rotating instruments for plastic processing.
Note: To prevent inaccurate fitting after polymerisation, avoid excessive heat development during finishing and polishing.| Design- dependent

Investment and burning out

Phosphate-bonded investment materials, such as are ideal, especially for use in investing additive designs
Observe the specifications and parameters of the respective investment material and alloy manufacturer for investment and burning out.
Irrespective of the final casting temperature, a holding time of at least 45 minutes at a temperature of at least 850 °C is recommended to burn out the plastic in order to be as residue-free as possible.

Storage of the liquid

Store dry and at room temperature (15 °C to 25 °C).
Avoid direct sunlight
Keep containers closed and seal carefully after use.
Do not return residual amounts from the material tub to the original container.
Long-term storage of the liquid in the material tub can reduce its service life.
For short-term storage, such as when changing materials, it is advisable to store the materialfilled tub in the original packaging, as this protects against dirt and light at the same time.

Disposal

The fully polymerized components are disposed of as residual waste.
Disposal of nonpolymerized product residues according to legal regulations.
Do not allow entry into the sewage system or waterways.

Notes

Do not use the material after the expiration date.
Record the LOT number with every process that requires identification of the material.
When selecting the parameter set, make sure it matches the version number of the liquid on the batch label.
Due to the reactivity of the liquid, it is recommended to clean wetted parts, such as forceps and the construction platform, immediately after use, as the polymerised material is difficult to remove.
If the cleaning fluid becomes noticeably cloudy, the cleaning capacity is spent and it should be replaced with fresh fluid. If there are still damp, sticky patches on the designs after the drying process, this is also an indication of a saturated cleaning fluid and the design should be cleaned again with fresh cleaning fluid.
When changing material / cleaning the material tub, use soft cloths and a silicone wiper to avoid damaging the surface of the material tub.
If other printers are used, make sure that the appropriate printer data sets are available in the CAM and that material parameters for the printers are available.

Warnings

Processing frameworks may generate dust which can lead to mechanical irritation of the eyes and airways. Therefore, always ensure that the extraction system at the workplace is working properly for individual post-processing and that you are using personal protective equipment.
Avoid direct skin contact with the unpolymerised mixture.
It is recommended to wear nitrile gloves when handling the liquid.
Observe the hazardous substance labelling as well as the hazard and safety instructions on the bottle.

For detailed information please see the applicable Material Safety Data Sheet, available upon request or as download from www.merz-dental.de.
The product properties are based on compliance with and observation of these instructions for use.
Printed copies of these instructions for use can be requested free of charge using the contact details provided.
The users themselves are responsible for the use of the product. Merz Dental assumes no liability and / or guarantee for the use of components that are not part of the system and / or for components that have not been tested and for incorrect results, as the manufacturer has no influence on processing. Any claims for damages that may still arise relate exclusively to the value of our products.
The company names and names of third-party products are trademarks or registered trademarks of the respective manufacturer.
The use of these names without reference to a (registered and / or protected) trademark or band mark etc. is not to be regarded as violation of the protective rights of these names and not as damage towards those companies, which possess these rights.
Date of information 2022-05

Merz Dental GmbH
Kieferweg 1 24321 Lütjenburg, Germany
Tel + 49 (0) 4381 / 403-0
Fax + 49 (0) 4381 / 403-403
907349/2022-05/01
www.merz-dental.de
EN ISO 13485