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http://dx.doi.org/10.14347/kadt.2011.33.3.211

A study on Common Errors in Digital Impressions: (An Example of CEREC$^{(R)}$ AC)  

Kim, Jae-Hong (Department of Health Science Specialized in Dental Lab. Science & Engineering, Graduate School, Korea University)
Kim, Ji-Hwan (Department of Health Science Specialized in Dental Lab. Science & Engineering, Graduate School, Korea University)
Kim, Hae-Young (Department of Health Science Specialized in Dental Lab. Science & Engineering, Graduate School, Korea University)
Publication Information
Journal of Technologic Dentistry / v.33, no.3, 2011 , pp. 211-218 More about this Journal
Abstract
Purpose: The purpose of the study was a quantitative evaluation of common errors in digital impression procedure using CEREC$^{(R)}$ AC system. Methods: Two-hundreds digital impression data comprising 174 inlays, 26 onlays by CEREC$^{(R)}$ AC in-office CAD/CAM system were obtained from a dental clinic. One evaluator assessed errors of the digital impression data and divided into five categories of errors: inappropriate scanner positioning (ISP), improper handling with a scanner (IHS), irregular powder arrangement (IPA), improper cavity preparation (ICP), and insufficient scanned data (ISD). Results: The most common errors were IPA(21%), and ISP and ISD were followed by 17% respectively. IHS was found in 14.5% of all digital impression data. ICP comprising only 6.5% was the rarest. Conclusion: Most errors were due to inaccurate manipulation with an intraoral scanner or improper cavity preparation for scanning. A deliberate manipulation to prevent common errors mentioned may deliver an optimal result in the digital impression procedure.
Keywords
CEREC$^{(R)}$ AC; dental restoration; digital impression; intraoral scanner;
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