Accuracy of capturing nasal, orbital, and auricular defects with extra- and intraoral optical scanners and smartphone: An in vitro study

Alexey Unkovskiy; Sebastian Spintzyk; Florian Beuer; Fabian Huettig; Ariadne Röhler; Pablo Kraemer-Fernandez

doi:10.1016/j.jdent.2021.103916

Accuracy of capturing nasal, orbital, and auricular defects with extra- and intraoral optical scanners and smartphone: An in vitro study

J Dent. 2022 Feb:117:103916. doi: 10.1016/j.jdent.2021.103916. Epub 2021 Dec 5.

Authors

Alexey Unkovskiy¹, Sebastian Spintzyk², Florian Beuer³, Fabian Huettig⁴, Ariadne Röhler⁵, Pablo Kraemer-Fernandez⁴

Affiliations

¹ Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany; Department of Dental Surgery, Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street, 19с1, 119146 Moscow, Russian Federation. Electronic address: alexey.unkovskiy@charite.de.
² Section Medical Materials Science and Technology, Tübingen University Hospital, Osianderstr. 2-8, 72076 Tuebingen, Germany; ADMiRE Lab-Additive Manufacturing, Intelligent Robotics, Sensors and Engineering, School of Engineering and IT, Carinthia University of Applied Sciences, 9524 Villach.
³ Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany.
⁴ Department of Prosthodontics at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2-8, Tbingen 72076, Germany.
⁵ Section Medical Materials Science and Technology, Tübingen University Hospital, Osianderstr. 2-8, 72076 Tuebingen, Germany.

PMID: 34875273
DOI: 10.1016/j.jdent.2021.103916

Abstract

Objectives: This in vitro study compares the scanning accuracy of various stationary and portable as well as extra- and intraoral devices for capturing oncological defects.

Methods: A 3D-printed model of a nasal, orbital, and auricular defect, as well as one of an intact auricle, were digitalized (n = 7 per device) with a stationary optical scanner (Pritiface), a portable extraoral optical scanner (Artec Space Spider), two intraoral scanners (Trios 4 and Primescan), and a smartphone (iPhone 11 Pro). For the reference data, the defect models were digitalized using a laboratory scanner (D2000). For quantitative analysis, the root mean square error value for trueness and precision and mean deviations in millimeters were obtained for each defect type. The data were statistically analyzed using two-way ANOVA and Tukey multiple comparison test. For qualitative analysis, a colorimetric map was generated to display the deviation within the defect area and adjacent tissue.

Results: Statistically significant interactions were found in the trueness and precision for defect and scanner type.

Conclusion: The Primescan and Artec Space Spider scanners showed the highest accuracy for most defect types. Primescan and Trios 4 failed to capture the orbital defect. The iPhone 11 Pro showed clinically acceptable trueness but inferior precision.

Clinical significance: The scanning devices may demonstrate varying accuracy, depending on the defect type. A portable extraoral optical scanner is an universal tool for the digitization of oncological defects. Alternatively, an intraoral scanner may be employed in maxillofacial prosthetics with some restrictions. Utilizing a smartphone in maxillofacial rehabilitation should be considered with caution, because it provides inconsistent accuracy.

Keywords: 3D printing; Additive manufacturing; Anaplastology; Auricular prosthesis; Face scanner; Facial prostheses; Maxillofacial prosthetics; Smartphone 3D scanner; Stereolithography.

MeSH terms

Computer-Aided Design
Dental Impression Technique*
Imaging, Three-Dimensional
Models, Dental*
Smartphone