Shining 3D currently offers two material choice for C&B application. TN11/ CB11 is a high toughness, high flexural strength material for restore natural tooth color and excellent texture. This material is recommended using small resin tank and small ceramic platform pack.
This application guide emonstrates each step from 3D scanning to 3D on AccuFab printers with normal resin tank (2 bottles C&B resin) or small resin tank (1 bottle C&B resin).
Use the current workflow to ensure a high satisfaction result.
Scan
Dental design software requires a digital impression of the patient’s anatomy in order to design a C&B related applications, such as crown, arch, veneers, etc.
To acquire this data, scan a patient directly with Aoralscan intraoral scanners or a poured model with AutoScan desktop scanners.
Design
There are several dental software options providing by Shining 3D. In this application guide, we will work through using Shining 3D self-developed temp design software CreTemp, or we provide options to use exocad for more advanced professional design.
There are also 3rd party design platform we provide from Shining 3D Dental Cloud to give our users more options for creating a design.
How to use CreTemp
Shining 3D provides CreTemp for AI one click design temps. Both or either upper and lower jaw can be imported into CreTemp.
The final product would need to have minor adjust to come out a good status. Of course, you could also use the third party professional CAD software to design.
TN11/CB11 Suggested Parameter
Minimum thickness (Crown) 0.8mm
Minimum occlusal thickness 0.8mm
After AI design, you can send file from ‘GO TO PRINT’ to Accuware. Choose the correct machine and serial number in advance if you have multiple printers.
There is layer thickness options including but not only limited to arrange between 50 and 100um.
Shining 3D software have a smooth connection, so users would not need to export and import with repeated action. But also third party design software is also supported to import into AccuWare with .stl format.
One-Click Printing
Crown and Bridge One-Click Printing can be used after importing the files, auto layout, support generation and slicing will be automatically performed with AI algorithm and can be sending to printer for printer.
You could check in support adding stage to make sure the models are well performed before slicing to save time.
Manually added support
You can adjust the model to an optimum position and choose the support type “C&B Support”. Place the model with occlusal side facing the platform and avoid fitting surface support added, otherwise this may cause unexpectable result when fitting.
Post-process
Part removal and washing
If you are using the standard ceramic platform, you could straightly select “Cut and Wash” for easy process.
If you are using the small ceramic platform, please be careful when remove the model by scrappers.
Select CB11 or TN11 during washing stage to use the default setting time for the well-washed outcome.
Support Removal
Remove the support after washing. Carefully remove the small part support and you could also use scissors to assist.
Washing
Ultrasonic Machine
Place the model in beaker with optimum amount IPA ≥75% covered. Use Ultrasonic machine (150-500W) around 2 min*. Change a clean beaker with the un-contaminated IPA and wash again. Washing for too long will affect the accuracy and strength of the model.
*If you have a strong power ultrasonic machine, please consider to decrease the washing time.
Hand Wash
Please use soft brush to gently clear the model or teeth surface and repeat washing for 1 min. Repeat the above procedure again for one more time.
Drying
Use the compressed air gun dry the cleaned model, please make sure the model surface is fully dried and no excess IPA and residue attaching.
If there is any residues attaching (with obvious reflection showing), please repeat the above cleaning procedure to wash again. After fully dried, place for 5 min and continue the further procedure.
Post-Curing
Place the model in FabCure 2, make sure no stacking model inside the plate. Use the pre-set TN11/CB11 parameter, or set in custom, with no heating and curing for 7 min. After curing, make sure the model to be placed 1-2 hrs for the most stable strength.
Griding
Carefully gride the support added area using small diamond griding head, to avoid the damage of the model surface.
After the griding of the crown/bridge, place the crown/ bridge on the model and die to test the fitting of the margin line. Use the grinding head with 150um (recommended speed 15,000-30,000 rpm/min), with the use of the bite sheet to fix the path of insertion of the crown/ bridge. Use a larger grinding head to adjust.
The perfect result would be the bite paper can be evenly removed from the occlusal teeth with the correct bite.
Polishing with Grinding
Polish the crown/ bridge surface.
Use 100um grinding head at recommended speed 10,000- 20,000 rpm/min for rough polishing.
Use 50um grinding head at recommended speed 10,000- 12,000 rpm/min for fine polishing.
Use the polishing head and finer brush with polishing wax to high shine. Use small amount of polishing wax at once, polish with even speed, to avoid the damage on thinner surface.
Place in the cleansing liquid (Alkaline ≤10%, temperature ≤ 40 degrees) with the use of ultrasonic machine and soft brush to clean the model surface.
*For the arch situation placing on denture, please find more information in Denture Application Guide.
Polishing with Resin
After grinding, use clean IPA and soft brush to clean the teeth surface to remove the surface dust and clean with compressed air gun. Use No6 ceramic pen for small amount CB11, evenly brush on the teeth surface.
*Too much may cause opposite result on surface.
Place in Nitrogen Gas Curing Box (eg: Otoflash with 500 flashes)
*If you only have normal curing box, after curing for 1 min, please place in IPA for a final clean.