3D Printing of multicolor dental productsFieldlab Multi-material 3D Printing

INTRODUCTION3D printing of dental crowns

HOW IT WAS DONEHand-made process for > 70 years

ADVANCEMENT OF DIGITAL WORKFLOW IN DENTALBuilding blocks for digital production

4

Dentist

Lab Scanner

Appliance Designer

CADImplant Studio

Ortho Analyzer

Dental LabDentist

Orthodontist Ortho Lab

Courtesy: 3DSystems Inc

CADCAM in early stage was subtractive instead of additive

CURRENT STATUS3D printing of permanent (mono-color) crowns & bridges

NEXT STEP: MULTICOLOR PRINTINGBecause mono-color crowns don’t have the ‘living’ look

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

MULTICOLOR CROWNS & BRIDGESPossible production methods

Hybrid manufacturing: combine Vat Photo-polymerization & Jetting technology

FIELDLAB MULTIMATERIAL 3DTechnology approach

Vat Photopolymerization

• High resolution & surface quality

• Biocompatible materials

• Good mechanical properties

Inkjet technology

• Possibility for multicolor

• Compatible with photopolymerization

COMPLETE DIGITAL WORKFLOWFocus on all aspects

MaterialScanPost Processing/

CuringSoftware Printer

SOFTWARE & PRINT STRATEGYHow 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 STRATEGYResults – 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

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UTS

(MPa

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Average UTS

BI-OC14

GB-Tie10

GB-Tie20

GB-Tie30

GB-Tie40

GB-Tie50

GB-IBO10

GB-IBO20

GB-IBO30

GB-IBO40

GB-IBO50

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E (M

Pa)

Average E-Modulus

MULTIMATERIAL PRINTINGProof of concept

MULTIMATERIAL JETTING - RESULTS

EQUIPMENT DEVELOPMENTCombining 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 PRODUCTCombining 3D geometry & color information

STL file for 3D geometry

Different shapesof red infillin each layer

3D PRINTED CROWN DEMO PRODUCTTarget 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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