Thus, the reproducibility of the impression is a core criterion that reflects the definitive outcome of the planned restoration. Different IOSs by the numbers of company are increasing that offer user-friendly, perceived as pleasant for the patient and time efficientĭental impressions, either conventional or digital, are primarily aimed at obtaining an imprint of one or more prepared teeth, the adjacent and antagonist as well, in conjunction with the inter-occlusal record relationship. Many CAD-CAM systems are available in the market for chairside digital impression and prosthesis fabrication. The intraoral digital scanning has been perceived as a more rapid and convenient technique from the perspective of both the dentists and the patients.ĭigital intraoral scanning has provided numerous benefits such as real-time visualization, easy repeatability, selective capture of the relevant areas, no need to disinfect and clean dental impressions and impression trays, cast pouring, no wear of the model, rapid communication and availability. The predicaments associated with conventional impression procedures have further highlighted the applications of intraoral scanners (IOSs). ![]() Based on the type of tissue scanned, various principles and technologies have been developed and are being applied. Obtaining three-dimensional images have accentuated the accuracy of the conventional prosthetic options and also provides for the virtual definition of various treatment strategies and to digitally design and fabricate varied types of restorations. Progress in digital dentistry has not only popularized the concepts of computer-aided design (CAD) and computer-aided manufacturing (CAM) but also created the provision for more efficacious and predictable therapeutic outcomes. 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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