Abstract
Statement of problem
A consensus on the accuracy of additively manufactured casts in comparison with those
fabricated by using conventional techniques for fixed dental prostheses is lacking.
Purpose
The purpose of this systematic review was to determine the accuracy of additively
manufactured casts for tooth- or implant-supported fixed dental prostheses in comparison
with that of gypsum casts.
Material and methods
This study adhered to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses
(PRISMA) guidelines and was registered with the International Prospective Register
of Systematic Reviews (PROSPERO) database (CDR42020161006). Eight databases were searched
in December 2019 and updated in September 2020. Studies evaluating the dimensional
accuracy of additively manufactured casts for fixed dental prostheses in comparison
with that of gypsum casts were included. An adapted checklist for reporting in vitro
studies (Checklist for Reporting In vitro Studies guidelines) was used to assess the
risk of bias.
Results
Eight studies evaluating tooth-supported fixed dental prosthesis casts and 7 studies
evaluating implant-supported fixed dental prosthesis casts were eligible for this
review. Gypsum casts showed greater accuracy (trueness and precision) in most studies,
although additively manufactured casts also yielded highly precise data. One study
was associated with a low risk of bias, 9 with a moderate risk of bias, and 5 with
a high risk of bias.
Conclusions
In vitro studies showed that additively manufactured casts and gypsum casts share
similar accuracy within the acceptable range for the fabrication of casts. The quality
of scanned data, additive manufacture technology, printing settings, and postprocessing
procedures plays an essential role in the accuracy of additively manufactured casts.
Clinical studies are required to confirm these findings.
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Article info
Publication history
Published online: February 04, 2021
Identification
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© 2020 by the Editorial Council for the Journal of Prosthetic Dentistry.
