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Advantages And Disadvantages Of CAD And CAM In Dentistry

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VIRTUAL RESTORATIONS USING CAD/CAM IN DENTISTRY ABSTRACT COMPUTER AIDED DESIGN AND COMPUTER AIDED MANUFACTURE in dentistry is an advanced dental technology for creating esthetic restorations, came into light since 1980s. Both chairside and chairside—laboratory integrated procedures are available for CAD/CAM restoration fabrication. This article describes about principles, brief history, use, advantage and disadvantages of CAD/CAM. Various types of available CAD/CAM systems are also discussed in this article. Earlier its efficiency was limited to labside use (dental laboratory) but with advancement in software and materials it has become possible to use it chairside. Depending on the method selected, CAD/CAM ceramic blocks …show more content…

DIGITAL IMPRESSION or DIGITIZATION: Precision and accuracy of the master impression and master dies are critical for clinically successful fixed restorations. Digital impression of prepared tooth and surrounding teeth is taken by intraoral scanners (In 2012, CEREC Omnicam by Sirona Dental System, 3M™ True Definition Scanner, In 2013 Carestream Dental joined the field with the launch of the CS 3500 intraoral scanner. Along with established popular brands like Align’s iTero, D4D Technologies’ E4D Dentist System and IOS Technologies’ IOS FastScan and TS150), digital impression have plenty of good options. Accuracy is major factor for the appropriate fit of fixed restoration. Data acquisition is performed either by intraoral digitization (patient’s mouth) or extraoral digitization (indirectly by taking impression and pouring master cast). Intraoral digitization method allows directly to obtain data from prepared tooth. Titanium oxide or magnesium oxide powder has to be applied to the glossy, lucent tooth surface in order to avoid reflections and create measurable surface. Once the margins are suitably exposed and the tooth is dry scanning can begin. The scanner is positioned first over the occlusal surface of the tooth being restored, and the red strobing light emission signals that scanning has begun. iTero scanner does not require powder

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