Further evaluation on a gypsum cast was undertaken for the E4D system. A thick layer of coating was applied and scanned (3M Lava COS). The models were scanned with intraoral scanners (3M Lava COS, Cerec AC/Bluecam, E4D, and iTero).
Models were fabricated in 3 materials (polymethyl methacrylate, titanium, and zirconia) and reference scanned with an industrial optical scanner. The purpose of the study was to evaluate the scanning accuracy and precision of 4 intraoral scanners and to assess the influence of different test materials and coating thicknesses. However, limited information is available regarding their accuracy, their precision, and the influence that refraction or coating may have on their output. Intraoral scanners may use proprietary acquisition and manufacturing processes.
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