3D Printing of multicolor dental products Fieldlab Multi-material 3D - - PowerPoint PPT Presentation

3D Printing of multicolor dental products

Fieldlab Multi-material 3D Printing

INTRODUCTION

3D printing of dental crowns

HOW IT WAS DONE

Hand-made process for > 70 years

ADVANCEMENT OF DIGITAL WORKFLOW IN DENTAL

Building blocks for digital production

4

Dentist

Lab Scanner Appliance Designer CAD Implant Studio Ortho Analyzer

Dental Lab Dentist Orthodontist Ortho Lab

Courtesy: 3DSystems Inc

CADCAM in early stage was subtractive instead of additive

CURRENT STATUS

3D printing of permanent (mono-color) crowns & bridges

NEXT STEP: MULTICOLOR PRINTING

Because mono-color crowns don’t have the ‘living’ look

Project goal: 3D printing a realistic crown in 1 hour, meeting mechanical and biocompatibility requirements

MULTICOLOR CROWNS & BRIDGES

Possible production methods

Hybrid manufacturing: combine Vat Photo-polymerization & Jetting technology

FIELDLAB MULTIMATERIAL 3D

Technology approach Vat Photopolymerization

• High resolution & surface quality
• Biocompatible materials
• Good mechanical properties

Inkjet technology

• Possibility for multicolor
• Compatible with photopolymerization

COMPLETE DIGITAL WORKFLOW

Focus on all aspects

Material Scan Post Processing/ Curing Software Printer

SOFTWARE & PRINT STRATEGY

How to create the right color effects?

• Starting point: Océ 2.5D Slicer used in fine art reproduction
• Towards dental crowns: 3D voxel-based color to achieve natural looking tooth

SOFTWARE & PRINT STRATEGY

Results – digital workflow

DEVELOPMENT OF SUITABLE INK

BI-OC14 GB-Tie10 GB-Tie20 GB-Tie30 GB-Tie40 GB-Tie50 GB-IBO10 GB-IBO20 GB-IBO30 GB-IBO40 GB-IBO50 10 20 30 40 50 60

UTS (MPa) Average UTS

B I

• O

C 1 4 G B

• T

i e 1 G B

• T

i e 2 G B

• T

i e 3 G B

• T

i e 4 G B

• T

i e 5 G B

• I

B O 1 G B

• I

B O 2 G B

• I

B O 3 G B

• I

B O 4 G B

• I

B O 5 50 100 150 200 250 300

E (MPa) Average E-Modulus

MULTIMATERIAL PRINTING

Proof of concept

MULTIMATERIAL JETTING - RESULTS

EQUIPMENT DEVELOPMENT

Combining vat photopolymerization & inkjet printing

• Starting from TNO Lepus technology (SLA)
• Added YZ stage for printhead
• Added printhead control
• Redesigned printjob software for modular approach

DESIGN OF CROWN DEMO PRODUCT

Combining 3D geometry & color information

STL file for 3D geometry Different shapes

• f red infill

in each layer

3D PRINTED CROWN DEMO PRODUCT

Target achieved!

Connie Peterse – van der Koppel

ACKNOWLEDGEMENTS

René van der Meer Kateryna Filippovych Felicia Ionascu Guy Bex Fabien Bruning Anton Aulbers

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