Evaluation of the accuracy and precision of four intraoral scanners with 70% reduced inlay and four-unit bridge models of international standard

Soo Hyuk Uhm, Jae Hong Kim, Heng Bo Jiang, Chang Woo Woo, Minho Chang, Kyoung Nam Kim, Ji Myung Bae, Seunghan Oh

Research output: Contribution to journalArticle

5 Citations (Scopus)


The aims of this study were to evaluate the feasibility of 70% reduced inlay and 4-unit bridge models of International Standard (ISO 12836) assessing the accuracy of laboratory scanners to measure the accuracy of intraoral scanner. Four intraoral scanners (CS3500, Trios, Omnicam, and Bluecam) and one laboratory scanner (Ceramill MAP400) were used in this study. The height, depth, length, and angle of the models were measured from thirty scanned stereolithography (STL) images. There were no statistically significant mean deviations in distance accuracy and precision values of scanned images, except the angulation values of the inlay and 4-unit bridge models. The relative errors of inlay model and 4-unit bridge models quantifying the accuracy and precision of obtained mean deviations were less than 0.023 and 0.021, respectively. Thus, inlay and 4-unit bridge models suggested by this study is expected to be feasible tools for testing intraoral scanners.

Original languageEnglish
Article numberdmj/2016-064
Pages (from-to)27-34
Number of pages8
JournalDental Materials Journal
Issue number1
Publication statusPublished - 2017



  • International standard
  • Intraoral scanner
  • Laboratory scanner
  • Precision
  • Trueness (Accuracy)

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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