Computer aided design computer aided manufacture (cad-cam)

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.