Fabrication of a resin appliance with alloy components using digital technology without an analog impression

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Author
Al Mortadi, Noor
Jones, Quentin
Eggbeer, Dominic
Lewis, Jeff
Williams, Robert J.
Date
2015Type
Article
Publisher
Elsevier Masson
Metadata
Show full item recordAbstract
The aim of this study was to fabricate a resin appliance incorporating “wire” components without the use of an
analog impression and dental casts using an intraoral scanner and computer technology to build the appliance.
This unique alignment of technology offers an enormous reduction in the number of fabrication steps when
compared with more traditional methods of manufacture. The prototype incorporated 2 Adams clasps and a fitted
labial bow. The alloy components were built from cobalt-chromium in an initial powdered form using established
digital technology methods and then inserted into a build of a resin base plate. This article reports the first known
use of computer-aided design and additive manufacture to fabricate a resin and alloy appliance, and constitutes
proof of the concept for such manufacturing. The original workflow described could be seen as an example for
many other similar appliances, perhaps with active components. The scan data were imported into an appropriate
specialized computer-aided design software, which was used in conjunction with a force feedback (haptic)
interface. The appliance designs were then exported as stereolithography files and transferred to an additive
manufacturing machine for fabrication. The results showed that the applied techniques may provide new
manufacturing and design opportunities in orthodontics and highlights the need for intraoral-specific additive
manufacture materials to be produced and tested for biocompatibility compliance. In a trial, the retainer was fitted
orally and judged acceptable by the clinician according to the typical criteria when placing such appliances in
situ.
Journal/conference proceeding
American Journal of Orthodontics and Dentofacial Orthopedics
Citation
Al Mortadi, N., Jones, Q., Eggbeer, D., Lewis, J. & Williams, R.J. (2015) "Fabrication of a resin appliance with alloy components using digital technology without an analog impression", American Journal of Orthodontics and Dentofacial Orthopedics, 148(5), pp.862-867.
Description
This article was published in American Journal of Orthodontics and Dentofacial Orthopedics on 01 November 2015 (online), available at: http://dx.doi.org/10.1016/j.ajodo.2015.06.014.
Rights
Creative Commons Attribution Non-Commercial No Derivatives (CC BY-NC-ND 3.0) LicenseCollections
Except where otherwise noted, this item's license is described as Creative Commons Attribution Non-Commercial No Derivatives (CC BY-NC-ND 3.0) License
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