Accession Number:



Time and Accuracy of the CEREC Omnicam Using Two Different Software Programs

Descriptive Note:

[Technical Report, Master's Thesis]

Corporate Author:


Personal Author(s):

Report Date:


Pagination or Media Count:



Statement of problem. The impact of guided scanning on the accuracy of full arch digital impressions is unknown. Purpose. The purpose of this in vitro study was to evaluate the effect of guided scanning on scan time, trueness and precision of digital impressions created by three providers using the CEREC Omnicam. Materials and Methods. A total of 60 20provider digital impressions of a standard resin model were made by 3 different providers using the CEREC Omni-cam. 10 scans each were completed using the CEREC Ortho module and 10 scans each were completed using the CERECSW 4.4.4 software. Time required to complete each full arch scan was recorded. Trueness was calculated by overlaying the digital models against a reference scan created using the standard model and a laboratory white light scanner. Intra-operator precision was calculated by overlaying each of digital models against each other, using each model as a reference. Non-parametric Mann Whitney U tests were used to determine significance between groups. Results. Scan times for the two programs were significantly different in each provider, with the Ortho module requiring a longer time to scan. In terms of trueness, no intra-provider difference was seen between the two programs. Pooled data indicated the Ortho software had significantly higher trueness than SW. Precision results showed a significant intra-provider difference in two providers with the Ortho software showing higher precision than SW. With data pooled the Ortho software demonstrated significantly higher precision. Conclusions. The CEREC Ortho software demonstrated higher overall trueness and precision, with slightly higher time needed to complete an impression.

Subject Categories:

  • Medicine and Medical Research

Distribution Statement:

[A, Approved For Public Release]