# Assessment of Dental Arch Reproduction Quality by Using Traditional and Digital Methods  
[PERSON]  
1 Department of Conservative Dentistry with Endodontics, Division of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland 1  
[PERSON]  
2 Unit of Periodonstal and Oral Mucozas Diseases, Department of Conservative Dentistry with Endodontics, Division of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland 2  
[PERSON]  
3 Unit of Dental Preodeeutics, Department of Conservative Dentistry with Endodontics, Division of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland 3  
[PERSON]  
4 Unit of Conservative Dentistry with Endodontics, Head of Department, Department of Conservative Dentistry with Endodontics, Division of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland 4  
[PERSON]  
2 University of Illinois at Urb  
Intraoral scanners differ in shape, price, weight, size and the way the tip is guided during scanning, i.e., the scanning path. They also provide differentiated working speed and indications. Currently, the standard are powder-free scanners, capturing an image in a color similar to natural, often available in a mobile version, which significantly facilitates work in several dental offices. Existing devices are based on several non-contact optical technologies such as confocal microscopy, photogrammetry or optical triangulation [6]. The scanner should be able to detect all the details of the scanned physical object, to generate a virtual three-dimensional model that is as close to it as possible. It is a common belief that scanning accuracy increases with increasing device resolution. However, there are scientific investigations in which the accuracy of the obtained digital models was usually lower for scanners characterized by higher resolution [7; 8]. [PERSON] et al. in their review of the literature on the accuracy achieved by intraoral scanners, they report that it is influenced by many factors. These include, for example, the scanner model, software version, the extent of the scanned dental arch, the presence or missing teeth, an implant or even color temperature, illuminance [9]. If intraoral scanners will provide similar or higher accuracy and will significantly reduce working time, they can be an alternative to traditional methods.  
Some research also show that the disinfection protocols in dental offices are not sufficiently followed, which results in the transfer of microorganisms (bacteria, viruses, including SARS-CoV2) to the dental laboratory. The patient's biological fluids containing microorganisms are transferred to the impressions, which, if not properly decontaminated, can be transferred to the plaster models [10].  
In the digital procedure, after scans are performed by the office staff, virtual models of the patient's dental arches received in the form of digital files are sent via internet to the laboratory without any contact between individuals. The tip of the scanner, which is in contact with the tissues of the patient's oral cavity during scanning, is removed and sterilized in an autoclave, which prevents the transmission of microorganisms between patients.  
Scientific reports comparing the accuracy of dental arches reproductions produced with digital methods versus traditional methods are rare and difficult to access. This fact prompted us to undertake research in this direction. The aim of this study was to assess the quality of the full upper dental arch standard model reproduction using traditional and digital methods.