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Digital casts in orthodontics: A comparison of 4 software systems

Journal article
Authors Anna Westerlund
Weronika Tancredi
Maria Ransjö
Andrea Bresin
S. Psonis
Olof Torgersson
Published in American Journal of Orthodontics and Dentofacial Orthopedics
Volume 147
Issue 4
Pages 509-516
ISSN 0889-5406
Publication year 2015
Published at Department of Applied Information Technology (GU)
Institute of Odontology, Section 3
Pages 509-516
Language en
Links dx.doi.org/10.1016/j.ajodo.2014.11....
Keywords OBJECTIVE GRADING SYSTEM, PLASTER MODELS, DENTAL CASTS, TOOTH-SIZE, ACCURACY, REPRODUCIBILITY, VALIDITY, INDEX, RELIABILITY, Dentistry, Oral Surgery & Medicine
Subject categories Surgical research

Abstract

Introduction: The introduction of digital cast models is inevitable in the otherwise digitized everyday life of orthodontics. The introduction of this new technology, however, is not straightforward, and selecting an appropriate system can be difficult. The aim of the study was to compare 4 orthodontic digital software systems regarding service, features, and usability. Methods: Information regarding service offered by the companies was obtained from questionnaires and Web sites. The features of each software system were collected by exploring the user manuals and the software programs. Replicas of pretreatment casts were sent to Cadent (OrthoCAD; Cadent, Carlstadt, NJ), OthoLab (O3DM; OrthoLab, Poznan, Poland), OrthoProof (DigiModel; OrthoProof, Nieuwegein, The Netherlands), and 3Shape (OrthoAnalyzer; 3Shape, Copenhagen, Denmark). The usability of the programs was assessed by experts in interaction design and usability using the "enhanced cognitive walkthrough" method: 4 tasks were defined and performed by a group of domain experts while they were observed by usability experts. Results: The services provided by the companies were similar. Regarding the features, all 4 systems were able to perform basic measurements; however, not all provided the peer assessment rating index or the American Board of Orthodontics analysis, simulation of the treatment with braces, or digital articulation of the casts. All systems demonstrated weaknesses in usability. However, OrthoCAD and 03DM were considered to be easier to learn for first-time users. Conclusions: In general, the usability of these programs was poor and needs to be further developed. Hands-on training supervised by the program experts is recommended for beginners.

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