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

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

  1. 1. CAD and Direct Manufacture of Removable Partial Dentures Dr. Richard Bibb
  2. 2. Acknowledgements Dr. Dominic Eggbeer Head of Medical Applications Group PDR UWIC Dr. Bob Williams Centre for Dental Technology UWIC
  3. 3. Why? To investigate moving to an entirely digital design and build procedure in dental technology How? Using 3D Scanning, advanced CAD and SLM Obstacles overcome Case studies time consuming, finding our own way! Successes Many cases done, test fitted to patients and published Introduction
  4. 4. Using optical scanning including structured white light and laser scanning Scanning
  5. 5. Using optical scanning including structured white light and laser scanning Scanning
  6. 6. Using optical scanning including structured white light and laser scanning Scanning
  7. 7. 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
  8. 8. FreeForm CAD
  9. 9. FreeForm CAD
  10. 10. FreeForm CAD
  11. 11. Using FreeForm CAD parting line function to perform virtual surveying Just like physical surveying Surveying
  12. 12. Design PDR pioneered full computer-aided design of RPD frameworks
  13. 13. Design PDR pioneered full computer-aided design of RPD frameworks
  14. 14. All design done according to best practice Design
  15. 15. All design done according to best practice Design incorporates all features Rests, clasps, relief, acrylic lines, connectors, etc. Design
  16. 16. Design
  17. 17. Design Final design of RPD framework with all relevant features added ready for direct manufacture
  18. 18. The framework needs supports during the build process The framework is oriented so supports do not interfere with the fitting surface Direct Manufacture
  19. 19. Direct Manufacture Selective Laser Melting (SLM)
  20. 20. Direct Manufacture
  21. 21. Direct Manufacture
  22. 22. 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
  23. 23. 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
  24. 24. Direct Manufacture The final RPD framework after finishing in the dental laboratory using standard techniques
  25. 25. Test Fitting The final RPD framework after finishing test fitted to the original patient cast
  26. 26. Test Fitting The final RPD framework after finishing test fitted to the original patient cast
  27. 27. The final RPD framework after finishing test fitted to the original patient cast Test Fitting
  28. 28. Test Fitting
  29. 29. 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
  30. 30. Conclusions SensAble now offer a dedicated version of their software for dental applications
  31. 31. 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

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