![]() While the accuracy of IOS systems appears to be promising and comparable to conventional methods, they are still vulnerable to inaccuracies. The studies indicated a variable outcome of the different IOS systems. Ninety-five articles were followed for full screening only 24 articles were included in the final analysis. After title and abstract screening, 412 articles were excluded for not meeting the inclusion criteria and discarding duplicate references. A search of MEDLINE (PubMed) identified 507 articles. An electronic search using PubMed with specific keywords to obtain potential references for review. The aim of this review was to assess the accuracy of the different IOS and the effect of different variables on the accuracy outcome. The development of three-dimensional technology and the trend of increasing the use of IOSs in dental office routine lead to the need to assess the accuracy of intraoral digital impressions. Intraoral scanners (IOSs) are used for capturing the direct optical impressions in dentistry.
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