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A REVIEW TO CAD/CAM RESTORATIONS
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COMPUTER AIDED DESIGN-COMPUTER AIDED MANUFACTURE (CAD-CAM)RESTORATIONS.
Zainab HajiRoll # 12Group BBatch # 18Department of Prosthodontics.Fatima Jinnah Dental College & Hospital.
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“Markets are changing across the board, and the dental industry is no exception. The
catalyst for change in this industry have been the digital platforms that have been
developed, working in concert with the economic situation we find ourselves in
today”JOHNSON [1]
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history
1950s U.S Air Force1971 Dr.Duret- Sopha System (crowns)1985 Dr. Moermann- CEREC® system
(inlay)1980s Dr. Andersson- Procera® system
(titanium copings and composite veneered restorations)
This system later developed as a processing center networked with satellite digitizers around the world for the fabrication of all-ceramic frameworks. [2]
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Types of CAD/CAM restorations
Inlays & onlays. Veneers. Coping. Substructures. Full coverage crowns.
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advantages
Eliminates second visit No casting errors
Accuracy of impression and restoration
No layering errors
Opportunity to view, adjust, rescan
Cost effective
No physical impression for the patient
Cross infection control
Saves time and labor No Temporization
View occlusion digitally Esthetic
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Disadvantages
Initial equipment cost
Capturing errors
Color- customization
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process
SCANNING
DESIGNING
MILLING
Intra oral abutments
impression
Working model
Wax up
Casting
Porcelain works
Final restoration
Luting to abutment
CONVENTIONAL LAB WORK
[3]
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Digitizers/scanners
Surface of stone models is measured by tools, called digitizers and scanners, to obtain digital data that represents morphology of target tooth.
Contact probe Laser beam with Position Sensing Device
sensor Laser with CCD camera
Intraoral digitizers
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[4]
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[5]
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[6]
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[7]
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Cad/cam systems
In office- scan, fabricate and seat within same appointment.
CAD/CAM dental lab models- scan a stone ast of prepared tooth in lab. Produce coping and poreclain is then added.
CAD/CAM for outsourcing- network machining centre
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[8]
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Different CAD/cam systems
CEREC 123 DCS Precident Cercon Procera All Ceram 1994 Cicero 1999 LAVA 2002 Everest Katana iTero
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DESIGNING
[9]
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Virtual Designing
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Milling blocks
Porcelain Ceramic blocks available as
Zirconia (fully sintered and partially sintered), ZirconiumOxide
Lithium disilicate glass blocks Glass infiltrated alumina Glass infiltrated alumina with
partially stabilized Zirconia Densely sintered high- purity
Alumina Yttria-stabilized tetragonal
Zirconia polycrystal material
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Milling Machines
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Types of manufacturing
Subtractive manufacturing- power driven machine tools as lathes, milling machines, drill press.
Additive manufacturing- series of cross sectional slices layered on top of one another.
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Luting
Resin Adhesive Cements:*light-cure*self-cure*dual-cure
[10]
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CASE presentation
Ref: Pract Proced Aesthet Dent 2006;18(3):A-F 200603PPAD_3980_Klim.qxd
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references
[1] Johnosn P. As the World Turns. The changing global marketplace is revolutionizing the way dental laboratories do business. Inside Dent Technol 2010;1(2),http://www.dentalaegis.com/idt/2010/12/as-the-world-turns
[2, 4, 5,6,] Dental Materials Journal 2009; 28(1): 44- 56[3] Australian Dental Journal 2011; 56:(1 Suppl): 97–106
doi: 10.1111/j.1834-7819.2010.01300.x[8,10] Innovation in Dentistry:CAD/CAM Restorative Procedures. A
Peer-Reviewed Publication, Written by James Klim, DDS, FAGD, FADFE and Edward B. Corrales
[7,9] CAD/CAM and Digital Impressions,Written by Paul Feuerstein, DMD and Sameer Puri, DDS
Few Images from google
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THANKYOU FOR YOUR ATTENTION.
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