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The Effect of Stacking on the Accuracy of 3D-Printed Full-Arch Dental Models

The objective of this study was to assess the effect of stacking on the dimensional and full-arch accuracy of 3D-printed models, utilising a standardised assessment methodology. A previously validated methodology involving a standard tessellation language image (STL) reference model, comprising seve...

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Autores principales: Hartley, Olan, Shanbhag, Tanvi, Smith, Derek, Grimm, Antonio, Salameh, Ziad, Tadakamadla, Santosh K., Alifui-Segbaya, Frank, Ahmed, Khaled E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9782610/
https://www.ncbi.nlm.nih.gov/pubmed/36559832
http://dx.doi.org/10.3390/polym14245465
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author Hartley, Olan
Shanbhag, Tanvi
Smith, Derek
Grimm, Antonio
Salameh, Ziad
Tadakamadla, Santosh K.
Alifui-Segbaya, Frank
Ahmed, Khaled E.
author_facet Hartley, Olan
Shanbhag, Tanvi
Smith, Derek
Grimm, Antonio
Salameh, Ziad
Tadakamadla, Santosh K.
Alifui-Segbaya, Frank
Ahmed, Khaled E.
author_sort Hartley, Olan
collection PubMed
description The objective of this study was to assess the effect of stacking on the dimensional and full-arch accuracy of 3D-printed models, utilising a standardised assessment methodology. A previously validated methodology involving a standard tessellation language image (STL) reference model, comprising seven spheres on a horseshoe base resembling a dental arch, was used. Six 3D-designed STL models were prepared, optimised, and stacked horizontally using 3D Sprint software. The stacking file was transferred to the NextDent 5100 printer to build the physical models. To assess accuracy, a coordinate measuring machine (CMM) measured the diameter of the spheres [Formula: see text] , and twenty-one vectors extended between the centres of each of the seven spheres (n = 630). When compared to the reference model, significant differences were observed for dimensional (p = 0.006) and full-arch accuracy (p = 0.006) for all stacked models. Additionally, significant differences were observed between the stacked models for the dimensional accuracy between the posterior (p = 0.015), left posterior (p = 0.005) and anteroposterior (p = 0.002). The maximum contraction was observed in the fourth stacked model, which demonstrated the highest median deviation and least precision within the full-arch (MD = 666 μm, IQR = 55 μm), left posterior (MD = 136 μm, IQR = 12 μm), posterior (MD = 177 μm, IQR = 14 μm) and anteroposterior (MD = 179 μm, IQR = 16 μm) arch segments. In general, the anterior and left posterior arch segments recorded the highest contractions with a median deviation of 34 μm and 29 μm, and precision of 32 μm and 22 μm, respectively. Statistically significant differences were observed between the stacked models in terms of dimensional accuracy that were within clinically acceptable thresholds. The greatest contraction was noted in the fourth model, displaying the least full-arch accuracy compared to the other models. Stacked, additively manufactured, full arch models are a viable alternative for diagnostic, orthodontic, and single-unit prosthodontic applications. In contrast, caution should be exercised when utilising stacked models for full arch high accuracy prosthodontic applications. Further research is needed to assess the impact of additional variables including different printers and resins.
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spelling pubmed-97826102022-12-24 The Effect of Stacking on the Accuracy of 3D-Printed Full-Arch Dental Models Hartley, Olan Shanbhag, Tanvi Smith, Derek Grimm, Antonio Salameh, Ziad Tadakamadla, Santosh K. Alifui-Segbaya, Frank Ahmed, Khaled E. Polymers (Basel) Article The objective of this study was to assess the effect of stacking on the dimensional and full-arch accuracy of 3D-printed models, utilising a standardised assessment methodology. A previously validated methodology involving a standard tessellation language image (STL) reference model, comprising seven spheres on a horseshoe base resembling a dental arch, was used. Six 3D-designed STL models were prepared, optimised, and stacked horizontally using 3D Sprint software. The stacking file was transferred to the NextDent 5100 printer to build the physical models. To assess accuracy, a coordinate measuring machine (CMM) measured the diameter of the spheres [Formula: see text] , and twenty-one vectors extended between the centres of each of the seven spheres (n = 630). When compared to the reference model, significant differences were observed for dimensional (p = 0.006) and full-arch accuracy (p = 0.006) for all stacked models. Additionally, significant differences were observed between the stacked models for the dimensional accuracy between the posterior (p = 0.015), left posterior (p = 0.005) and anteroposterior (p = 0.002). The maximum contraction was observed in the fourth stacked model, which demonstrated the highest median deviation and least precision within the full-arch (MD = 666 μm, IQR = 55 μm), left posterior (MD = 136 μm, IQR = 12 μm), posterior (MD = 177 μm, IQR = 14 μm) and anteroposterior (MD = 179 μm, IQR = 16 μm) arch segments. In general, the anterior and left posterior arch segments recorded the highest contractions with a median deviation of 34 μm and 29 μm, and precision of 32 μm and 22 μm, respectively. Statistically significant differences were observed between the stacked models in terms of dimensional accuracy that were within clinically acceptable thresholds. The greatest contraction was noted in the fourth model, displaying the least full-arch accuracy compared to the other models. Stacked, additively manufactured, full arch models are a viable alternative for diagnostic, orthodontic, and single-unit prosthodontic applications. In contrast, caution should be exercised when utilising stacked models for full arch high accuracy prosthodontic applications. Further research is needed to assess the impact of additional variables including different printers and resins. MDPI 2022-12-13 /pmc/articles/PMC9782610/ /pubmed/36559832 http://dx.doi.org/10.3390/polym14245465 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hartley, Olan
Shanbhag, Tanvi
Smith, Derek
Grimm, Antonio
Salameh, Ziad
Tadakamadla, Santosh K.
Alifui-Segbaya, Frank
Ahmed, Khaled E.
The Effect of Stacking on the Accuracy of 3D-Printed Full-Arch Dental Models
title The Effect of Stacking on the Accuracy of 3D-Printed Full-Arch Dental Models
title_full The Effect of Stacking on the Accuracy of 3D-Printed Full-Arch Dental Models
title_fullStr The Effect of Stacking on the Accuracy of 3D-Printed Full-Arch Dental Models
title_full_unstemmed The Effect of Stacking on the Accuracy of 3D-Printed Full-Arch Dental Models
title_short The Effect of Stacking on the Accuracy of 3D-Printed Full-Arch Dental Models
title_sort effect of stacking on the accuracy of 3d-printed full-arch dental models
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9782610/
https://www.ncbi.nlm.nih.gov/pubmed/36559832
http://dx.doi.org/10.3390/polym14245465
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