© R. Bibb May 2009 CAD and Direct Manufacture of Removable ...

© R. Bibb May 2009

CAD and Direct Manufacture of Removable Partial Dentures

Dr. Richard Bibb

© R. Bibb May 2009

Acknowledgements

Dr. Dominic EggbeerHead of Medical Applications Group PDRUWIC

Dr. Bob WilliamsCentre for Dental TechnologyUWIC

© R. Bibb May 2009

Why?To investigate moving to an entirely digital design and build procedure in dental technology

How?Using 3D Scanning, advanced CAD and SLM

Obstacles overcomeCase studies time consuming, finding our own way!

SuccessesMany cases done, test fitted to patients and published

Introduction

© R. Bibb May 2009

Using optical scanning including structured white light and laser scanning

Scanning

© R. Bibb May 2009

FreeForm enables the design of complex forms and shapes and utilises a haptic feedback device that enables true 3D work in all axes

FreeForm CAD

© R. Bibb May 2009

FreeForm CAD

© R. Bibb May 2009

Using FreeForm CAD parting line function to perform virtual surveying

Just like physical surveying

Surveying

© R. Bibb May 2009

Design

PDR pioneered full computer-aided design of RPD

frameworks

© R. Bibb May 2009

Design

PDR pioneered full computer-aided design of

RPD frameworks

© R. Bibb May 2009

All design done according

to best practice

Design

© R. Bibb May 2009

All design done according

to best practice

Design incorporates all

features

Rests, clasps, relief,

acrylic lines, connectors,

etc.

Design

© R. Bibb May 2009

Design

© R. Bibb May 2009

Design

Final design of RPD

framework with all

relevant features

added ready for

direct manufacture

© R. Bibb May 2009

The framework

needs supports

during the build

process

The framework is

oriented so supports

do not interfere with

the fitting surface

Direct Manufacture

© R. Bibb May 2009

Direct Manufacture

Selective

Laser

Melting

(SLM)

© R. Bibb May 2009

Direct Manufacture

© R. Bibb May 2009

RPD framework directly manufactured in Cobalt-Chrome alloy

Supports cutaway with cutting disk

Framework treated exactly the same as a casting from this point onwards

Direct Manufacture

© R. Bibb May 2009

Direct Manufacture

The final RPD framework after finishing in the dental laboratory using standard techniques

© R. Bibb May 2009

Conclusions

The collaborative research has demonstrated that the digital design and direct manufacture of RPD frameworks is entirely feasible

Scanning, surveying, design and manufacture have been demonstrated to be feasible, practical and efficient

The findings have been subject to peer review and widely published

Dental laboratories are now seriously investigating this route and commercial implementation is imminent

© R. Bibb May 2009

Williams RJ, Bibb R, Eggbeer D, “CAD/CAM Fabricated Removable Partial-Denture Alloy Frameworks”, Practical Procedures & Aesthetic Dentistry 2008; 20(6): 349-51

Williams RJ, Eggbeer D, Bibb R, “CAD/CAM Rapid Manufacturing Techniques in the Fabrication of Removable Partial Denture Frameworks”, Quintessence Journal of Dental Technology 2008; 6(1): 42-50

Bibb R, Eggbeer D, Williams RJ, Woodward A, “Trial fitting of a removable partial denture framework made using computer-aided design and rapid prototyping techniques”, Proceedings of the Institute of Mechanical Engineers Part H: Journal of Engineering in Medicine 2006; 220(7): 793-7

Williams RJ, Bibb R, Eggbeer D, Woodward A, “A Patient-fitted removable partial denture framework fabricated from a CAD/CAM-produced sacrificial pattern”, Quintessence Journal of Dental Technology 2006; 4(3): 200-4

Williams RJ, Bibb R, Eggbeer D, Collis J, “Use of CAD/CAM technology to fabricate a removable partial denture framework”, Journal of Prosthetic Dentistry 2006; 96(2): 96-9

Bibb R, Eggbeer D, Williams R, “Rapid manufacture of removable partial denture frameworks”, Rapid Prototyping Journal 2006; 12(2): 95-9

Eggbeer D, Bibb R, Williams R, “The Computer Aided Design and Rapid prototyping of Removable Partial Denture Frameworks” Proceedings of the Institute of Mechanical Engineers Part H: Journal of Engineering in Medicine 2005; 219(3): 195-202

Eggbeer D, Williams RJ, Bibb R, “A Digital Method of Design and Manufacture of Sacrificial Patterns for Removable Partial Denture Metal Frameworks” Quintessence Journal of Dental Technology 2004; 2: 490-9

Williams RJ, Bibb R, Eggbeer D, “CAD/CAM in the Fabrication of Removable Partial Denture Frameworks: A Virtual Method of Surveying 3D Scanned Dental Casts” Quintessence Journal of Dental Technology 2004; 2: 268-76

Williams RJ, Bibb R, Rafik T, “A technique for fabricating patterns for removable partial denture frameworks using digitized casts and electronic surveying” Journal of Prosthetic Dentistry 2004; 91: 85-8

References

© R. Bibb May 2009 CAD and Direct Manufacture of Removable ...

Documents

Transcript of © R. Bibb May 2009 CAD and Direct Manufacture of Removable ...