Accuracy and precision of intraoral scanners for shade matching: A systematic review

J Prosthet Dent. 2022 Nov 5:S0022-3913(22)00565-0. doi: 10.1016/j.prosdent.2022.08.034. Online ahead of print.


Statement of problem: The use of intraoral scanners is rising in prosthetic dentistry; however, systematic analysis of their accuracy and precision for shade matching is scarce.

Purpose: The purpose of this systematic review was to evaluate the accuracy and precision of intraoral scanners for shade matching.

Material and methods: In addition to a manual search, an electronic systematic search was conducted on MEDLINE/PubMed, EMBASE, Web of Science, Cochrane, and Scopus databases. English-language original studies published between January 1, 2010 and March 1, 2022 with intraoral or digital scanners were chosen based on the keywords of tooth color or shade selection or determination, color or shade matching, accuracy, validity, or trueness, and precision, repeatability, or reproducibility as inclusive criteria. Two reviewers independently performed the literature search, selected the studies, collected the data from the studies included, and evaluated the quality of the studies included using a quality assessment method and the Joanna Briggs Institute Critical Appraisal Checklist for Quasi-Experimental Studies. A third reviewer resolved disagreements.

Results: A total of 17 articles concerning the shade matching accuracy and precision of intraoral scanners were selected and reviewed. Among them, 4 articles evaluated only accuracy, 4 articles assessed only precision, and 9 articles investigated both accuracy and precision. Ten articles reported low levels of shade matching accuracy for intraoral scanners, while 11 articles reported high levels of shade matching precision for intraoral scanners.

Conclusions: Based on the current literature, intraoral scanners show acceptable precision but unacceptable accuracy for shade matching.

Publication types

  • Review