Accuracy of four digital scanners according to scanning strategy in complete-arch impressions

Although there are specific and general digital scanning guidelines depending on the system used, it is important to have the necessary flexibility in the acquisition of three-dimensional (3D) images to adapt to any clinical situation without affecting accuracy. The purpose of this in vitro study wa...

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Bibliographic Details
Published in:PloS one 2018-09, Vol.13 (9), p.e0202916-e0202916
Main Authors: Medina-Sotomayor, Priscilla, Pascual M, Agustín, Camps A, Isabel
Format: Article
Language:English
Subjects:
Accuracy
Biology and Life Sciences
Data processing
Dental materials
Dentistry
Digital scanners
Dimensional analysis
Engineering and Technology
Flexibility
Image acquisition
Laboratories
Medicine and Health Sciences
Physical Sciences
Prostheses
Research and Analysis Methods
Scanners
Scanning
Social Sciences
Statistical analysis
Strategy
Studies
Teeth
Three-dimensional imaging
Transplants & implants
Variance analysis
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Summary:Although there are specific and general digital scanning guidelines depending on the system used, it is important to have the necessary flexibility in the acquisition of three-dimensional (3D) images to adapt to any clinical situation without affecting accuracy. The purpose of this in vitro study was to identify and compare the scanning strategy with the greatest accuracy, in terms of trueness and precision, of four intraoral scanners in the impression of a complete dental arch. Four digital scanners were evaluated with a 3D measuring software, using a highly accurate reference model obtained from an industrial scanner as a comparator. Four scanning strategies were applied 10 times on a complete maxillary arch cast inside a black methacrylate box. The data were statistically analyzed using one-way analysis of variance (ANOVA) and post hoc comparisons with Tamhane T2 test. The trueness of the Trios and iTero system showed better results with strategy "D," Omnicam with strategy "B," and True Definition with strategy "C". In terms of precision, both iTero and True Definition showed better results with strategy "D", while Trios showed best results with strategy "A" and Omnicam with strategy "B". There were significant differences between the scanning strategies (p0.05). The digital impression systems used in the experiment provided sufficient flexibility for the acquisition of 3D images without this affecting the accuracy of the scanner.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0202916