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Cad Cam dentistry and digital impressions


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Digital impression, CAD CAM dentistry

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Cad Cam dentistry and digital impressions

  1. 1. CAD CAM Dentistry and Digital Impression
  2. 2. Greetings from AECS Maaruti College of Dental Sciences Bangalore
  3. 3. Dentistry v/s CAD CAM Dentistry
  4. 4. “Lemon” Dr. Werner Mörmann, Dr. Marco Brandestini, Dr. Alain Ferru
  5. 5. Applications of CAD CAM dentistry
  6. 6. Impression A negative likeness or copy in reverse of the surface of an object ; imprint of teeth and adjacent structures for use in dentistry. GPT – 8
  7. 7. Conventional v/s Digital • The digital impression cuts down turnaround time • more comfortable for the patient • gives more accurate fit and remakes are fewer • improves dentist/lab communication • gives a competitive advantage
  8. 8. Year, first author Test variability Conclusion 2014, Svanborg etal Marginal fit, Digital and conventional impression The digital impression is more accurate and can generate a 3unit FDPs with significantly closer fit than VPS impression 2014, Yuzbasigolu etal Patient comfort, effectiveness, clinical outcome The digital impression is time effective and patient prefer digital impression method than the traditional one. 2014, Ender etal Accuracy of digital and conventional impression The digital impression showed excellent clinical results within their indications and applying the right technique of scanning 2013, Lee etal Digital impression perception of student and clinician The digital impression was most effective technique and students find difficulty in conducting traditional technique. 2012, Galhano etal Optical impression methods The digital impression was speed, effective and less invasive than traditional methods. 2010,Poticny etal Predictability and esthetic out comes The digital impression allows immediate evaluation of preparations and margins
  9. 9. Digital Impression Basic components of CAD CAM involves: 1. Digitalized Scanner • Optical Scanner • Mechanical scanner 2. Design Software 3. Processing Device or Computer numeric control machine “ Could cavities be scanned by ultrasound ? ”
  10. 10. Optical Scanner • Based on the principle of triangulation • The light source and the receptor unit are in a definite angulation in relation to each other Eg: Everest scan, Lava Scan, es1 Mechanical Scanner • The master cast is read mechanically line by line by means of a ruby ball • The 3D structure is measured Eg: Procera scanner
  11. 11. Open v/s. Closed Architecture Based on data files created : • Open-architecture files, typically termed STL files, are not dependent on the manufacturer, and can be used virtually in any design software to fabricate a final restoration • Closed-system software architecture collects and manipulates data modules by the same manufacturer, offering laboratory owners security and a one-stop for resolving problems
  12. 12. Based on the location of processing unit • Chairside Production • Laboratory Production • Centralised fabrication in production centre
  13. 13. Chairside digital impression systems with laboratory transfer capability i-Tero Lava C.O.S CEREC AC
  14. 14. Features Candent i-Tero 3M Lava C.O.S Sirona CEREC AC Optical technology Parallel confocal / telecentric Wavefront Sampling technology LED / Laser sampling Powder requirement No Yes Yes (optispray) Models Milled PU, removable dies, soft tissue profile Additive / SLA blue resin one solid model & one working model Additive / SLA; no tissue Digital interface Open Closed ( LAVA) Closed (CEREC In-Lab) Articulators All movements, attachment to Whipmix full articulator for complex cases Articulated; Centric and lateral excursions Hinge only Indications All Upto 4UB and singles All
  15. 15. Recent Advances
  16. 16. Features CEREC Omnicam CEREC Bluecam Imaging technique Continuous color imaging Continuous data acquisition generates a 3D model Single image acquisition A few images are combined to create a 3Dmodel Patient counseling mode Yes - 3D scans in color Yes - Powder usage - Yes Area of application Single tooth, quadrant, full mouth Single tooth, quadrant (full mouth possible) Advantages • Unrivalled handling • Powder free scanning • Precise 3D images in natural color • High precision • Ease of operation • Rapid acquisition of power- coated surfaces
  17. 17. Clinic and laboratory relationship • Adopting CAD/CAM technology into a practice, even at the highest level, does not have to mean an end to the doctor-laboratory relationship • The integration of digital scanning technology can save time and reduce remake rates for the laboratory. • Digital scanning and digital photography both offer the ability to convey accurate digital information between the clinician and the laboratory technician and vice versa
  18. 18. References • Mörmann WH, The evolution of the CEREC systemJADA 2006;137(9 supplement):7S-13S. • Abduo J, Lyons K, Bennamoun M, Trends in Computer-Aided Manufacturing in Prosthodontics: A Review of the available streams, International Journal of Dentistry Volume 2014, Article ID 783948, 15 pages • Prajapati A etal, Dentistry Goes Digital: A Cad-Cam Way- A Review Article IOSR-JDMS.Vol13, Iss8 Ver. IV (Aug. 2014), PP 53-59
  19. 19. • Coppa A. et al. "Early Neolithic tradition of dentistry: Flint tips were surprisingly effective for drilling tooth enamel in a prehistoric population." Nature. Vol. 440. 6 April 2006. • Lowe RA. CAD CAM dentistry and digital impression making. • Baroudi K., and S. N. Ibraheem. "Assessment of Chair- side Computer-Aided Design and Computer-Aided Manufacturing Restorations: A Review of the Literature." Journal of international oral health: JIOH Vol 7 iss.4 (2015): 96-104. • Harsono M etal. Evolution of Chairside CAD/CAM Dentistry. Inside Dentistry October 2012, Vol 8, Iss 10