Cargando…

Accuracy evaluation of 3D printed interim prosthesis fabrication using a CBCT scanning based digital model

OBJECTIVES: This study aimed to evaluate the marginal and internal gaps in 3D-printed interim crowns made from digital models of cone-beam computed tomography (CBCT) conversion data. MATERIALS AND METHODS: Sixteen polyvinylsiloxane impressions were taken from patients for single crown restorations a...

Descripción completa

Detalles Bibliográficos
Autores principales: Kim, Young Hyun, Jung, Bock-Young, Han, Sang-Sun, Woo, Chang-Woo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7567388/
https://www.ncbi.nlm.nih.gov/pubmed/33064731
http://dx.doi.org/10.1371/journal.pone.0240508
_version_ 1783596316875554816
author Kim, Young Hyun
Jung, Bock-Young
Han, Sang-Sun
Woo, Chang-Woo
author_facet Kim, Young Hyun
Jung, Bock-Young
Han, Sang-Sun
Woo, Chang-Woo
author_sort Kim, Young Hyun
collection PubMed
description OBJECTIVES: This study aimed to evaluate the marginal and internal gaps in 3D-printed interim crowns made from digital models of cone-beam computed tomography (CBCT) conversion data. MATERIALS AND METHODS: Sixteen polyvinylsiloxane impressions were taken from patients for single crown restorations and were scanned using CBCT. The scanning data were converted to positive Standard Triangulation Language (STL) files using custom-developed software. The fabricated stone models were scanned with an intraoral optical scanner (IOS) to compare the surface accuracy with the STL data obtained by CBCT. The converted STL files were utilized to fabricate interim crowns with a photopolymer using a digital light-processing 3D printer. The replica method was used to analyze the accuracy. The marginal and internal gaps in the replica specimen of each interim crown were measured with a digital microscope. The Friedman test and Mann-Whitney U test (Wilcoxon-signed rank test) were conducted to compare the measurements of the marginal and internal gaps with a 95% level of confidence. RESULTS: The root-mean-square values of the CBCT and IOS ranged from 41.00 to 126.60 μm, and the mean was 60.12 μm. The mean values of the marginal, internal, and total gaps were 132.96 (±139.23) μm, 137.86 (±103.09) μm, and 135.68 (±120.30) μm, respectively. There were no statistically significant differences in the marginal or internal gaps between the mesiodistal and buccolingual surfaces, but the marginal area (132.96 μm) and occlusal area (255.88 μm) had significant mean differences. CONCLUSION: The marginal gap of the fabricated interim crowns based on CBCT STL data was within the acceptable range of clinical success. Through ongoing developments of high-resolution CBCT and the digital model conversion technique, CBCT might be an alternative method to acquire digital models for interim crown fabrication.
format Online
Article
Text
id pubmed-7567388
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher Public Library of Science
record_format MEDLINE/PubMed
spelling pubmed-75673882020-10-21 Accuracy evaluation of 3D printed interim prosthesis fabrication using a CBCT scanning based digital model Kim, Young Hyun Jung, Bock-Young Han, Sang-Sun Woo, Chang-Woo PLoS One Research Article OBJECTIVES: This study aimed to evaluate the marginal and internal gaps in 3D-printed interim crowns made from digital models of cone-beam computed tomography (CBCT) conversion data. MATERIALS AND METHODS: Sixteen polyvinylsiloxane impressions were taken from patients for single crown restorations and were scanned using CBCT. The scanning data were converted to positive Standard Triangulation Language (STL) files using custom-developed software. The fabricated stone models were scanned with an intraoral optical scanner (IOS) to compare the surface accuracy with the STL data obtained by CBCT. The converted STL files were utilized to fabricate interim crowns with a photopolymer using a digital light-processing 3D printer. The replica method was used to analyze the accuracy. The marginal and internal gaps in the replica specimen of each interim crown were measured with a digital microscope. The Friedman test and Mann-Whitney U test (Wilcoxon-signed rank test) were conducted to compare the measurements of the marginal and internal gaps with a 95% level of confidence. RESULTS: The root-mean-square values of the CBCT and IOS ranged from 41.00 to 126.60 μm, and the mean was 60.12 μm. The mean values of the marginal, internal, and total gaps were 132.96 (±139.23) μm, 137.86 (±103.09) μm, and 135.68 (±120.30) μm, respectively. There were no statistically significant differences in the marginal or internal gaps between the mesiodistal and buccolingual surfaces, but the marginal area (132.96 μm) and occlusal area (255.88 μm) had significant mean differences. CONCLUSION: The marginal gap of the fabricated interim crowns based on CBCT STL data was within the acceptable range of clinical success. Through ongoing developments of high-resolution CBCT and the digital model conversion technique, CBCT might be an alternative method to acquire digital models for interim crown fabrication. Public Library of Science 2020-10-16 /pmc/articles/PMC7567388/ /pubmed/33064731 http://dx.doi.org/10.1371/journal.pone.0240508 Text en © 2020 Kim et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Kim, Young Hyun
Jung, Bock-Young
Han, Sang-Sun
Woo, Chang-Woo
Accuracy evaluation of 3D printed interim prosthesis fabrication using a CBCT scanning based digital model
title Accuracy evaluation of 3D printed interim prosthesis fabrication using a CBCT scanning based digital model
title_full Accuracy evaluation of 3D printed interim prosthesis fabrication using a CBCT scanning based digital model
title_fullStr Accuracy evaluation of 3D printed interim prosthesis fabrication using a CBCT scanning based digital model
title_full_unstemmed Accuracy evaluation of 3D printed interim prosthesis fabrication using a CBCT scanning based digital model
title_short Accuracy evaluation of 3D printed interim prosthesis fabrication using a CBCT scanning based digital model
title_sort accuracy evaluation of 3d printed interim prosthesis fabrication using a cbct scanning based digital model
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7567388/
https://www.ncbi.nlm.nih.gov/pubmed/33064731
http://dx.doi.org/10.1371/journal.pone.0240508
work_keys_str_mv AT kimyounghyun accuracyevaluationof3dprintedinterimprosthesisfabricationusingacbctscanningbaseddigitalmodel
AT jungbockyoung accuracyevaluationof3dprintedinterimprosthesisfabricationusingacbctscanningbaseddigitalmodel
AT hansangsun accuracyevaluationof3dprintedinterimprosthesisfabricationusingacbctscanningbaseddigitalmodel
AT woochangwoo accuracyevaluationof3dprintedinterimprosthesisfabricationusingacbctscanningbaseddigitalmodel