Abstract
Statement of problem
The process of manufacturing stereolithographic surgical guides for static computer-guided
implant placement involves a series of steps. Errors can be incorporated in various
forms and at various stages of manufacturing these guides. Errors introduced during
this process have not been fully investigated.
Purpose
The purpose of this in vitro study was to assess the errors introduced during the
manufacture of stereolithographic surgical guides generated from cone beam computed
tomography (CBCT) and digital scans by using a virtual implant planning software.
Material and methods
Ten stereolithographic surgical guides with the associated standard tessellation language
(STL) files of their virtual design were used in this study. The STL files of the
virtual design and the scans of the stereolithographic surgical guides were superimposed.
Linear deviation at the center of the sleeve top and sleeve base and the angular deviation
at the center of the sleeve were measured.
Results
The minimum and maximum linear deviation at the center of the sleeve top and the sleeve
base was found to be 0 and 40 μm, with less linear deviation observed at the center
of the sleeve top (mean ±standard deviation 18 ±7 μm) than at the center of the sleeve
base (20 ±7 μm). The minimum and maximum angular deviation at the center of the sleeve
was found to be 0 degrees and 5.9 degrees respectively, with a mean ± standard deviation
of 1.36 ±0.74 degrees.
Conclusions
Errors were found in the sleeve position between the virtual design and the stereolithographically
manufactured surgical guide. This error may introduce errors in the final implant
position.
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Article info
Publication history
Published online: February 11, 2021
Footnotes
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
Identification
Copyright
© 2021 by the Editorial Council for the Journal of Prosthetic Dentistry.
