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Marginal and internal fit of full ceramic crowns milled using CADCAM systems on cadaver full arch scans
BACKGROUND: Chairside systems are becoming more popular for fabricating full-ceramic single restorations, but there is very little knowledge about the effect of the entire workflow process on restoration fit. Therefore, this study aimed to compare the absolute marginal discrepancy (AMD) and the full...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7339429/ https://www.ncbi.nlm.nih.gov/pubmed/32631333 http://dx.doi.org/10.1186/s12903-020-01181-9 |
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author | Vág, János Nagy, Zsolt Bocklet, Christopher Kiss, Tamás Nagy, Ákos Simon, Botond Mikolicz, Ákos Renne, Walter |
author_facet | Vág, János Nagy, Zsolt Bocklet, Christopher Kiss, Tamás Nagy, Ákos Simon, Botond Mikolicz, Ákos Renne, Walter |
author_sort | Vág, János |
collection | PubMed |
description | BACKGROUND: Chairside systems are becoming more popular for fabricating full-ceramic single restorations, but there is very little knowledge about the effect of the entire workflow process on restoration fit. Therefore, this study aimed to compare the absolute marginal discrepancy (AMD) and the full internal fit (FULL) of all-ceramic crowns made by two chairside systems, Planmeca FIT and CEREC, with detailed and standard mill settings. METHODS: One upper molar was prepared for an all-ceramic crown in human cadaver maxilla. Full-arch scans were made by Emerald or Omnicam four times each. Twenty-four e.max crowns were designed and milled by the Planmill 30s or 40s or CEREC MCXL mills with either detailed or standard settings. The cadaver tooth was extracted, and each crown was fixed on it and scanned by a high-resolution microCT scanner. The AMD and FULL were measured digitally in mesio-distal and bucco-lingual 2D slices. The actual and predicted times of the milling were also registered. RESULTS: No differences were observed between detailed or standard settings in either system. The AMD was significantly higher with CEREC (132 ± 12 μm) than with either Planmill 30s (71 ± 6.9 μm) or 40s (78 ± 7.7 μm). In standard mode, the FULL was significantly higher with CEREC (224 ± 9.6 μm) than with either Planmill 30s (169 ± 8.1 μm) or 40s (178 ± 8.5 μm). There was no difference between actual and predicted time with the two Planmeca models, but with CEREC, the actual time was significantly higher than the predicted time. The 30s had significantly higher actual and predicted times compared to all other models. Across all models, the average milling time was 7.2 min less in standard mode than in detailed mode. CONCLUSIONS: All fit parameters were in an acceptable range. No differences in fit between Planmeca models suggest no effect of spindle number on accuracy. The detailed setting has no improvement in the marginal or internal fit of the restoration, yet it increases milling time. |
format | Online Article Text |
id | pubmed-7339429 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-73394292020-07-09 Marginal and internal fit of full ceramic crowns milled using CADCAM systems on cadaver full arch scans Vág, János Nagy, Zsolt Bocklet, Christopher Kiss, Tamás Nagy, Ákos Simon, Botond Mikolicz, Ákos Renne, Walter BMC Oral Health Research Article BACKGROUND: Chairside systems are becoming more popular for fabricating full-ceramic single restorations, but there is very little knowledge about the effect of the entire workflow process on restoration fit. Therefore, this study aimed to compare the absolute marginal discrepancy (AMD) and the full internal fit (FULL) of all-ceramic crowns made by two chairside systems, Planmeca FIT and CEREC, with detailed and standard mill settings. METHODS: One upper molar was prepared for an all-ceramic crown in human cadaver maxilla. Full-arch scans were made by Emerald or Omnicam four times each. Twenty-four e.max crowns were designed and milled by the Planmill 30s or 40s or CEREC MCXL mills with either detailed or standard settings. The cadaver tooth was extracted, and each crown was fixed on it and scanned by a high-resolution microCT scanner. The AMD and FULL were measured digitally in mesio-distal and bucco-lingual 2D slices. The actual and predicted times of the milling were also registered. RESULTS: No differences were observed between detailed or standard settings in either system. The AMD was significantly higher with CEREC (132 ± 12 μm) than with either Planmill 30s (71 ± 6.9 μm) or 40s (78 ± 7.7 μm). In standard mode, the FULL was significantly higher with CEREC (224 ± 9.6 μm) than with either Planmill 30s (169 ± 8.1 μm) or 40s (178 ± 8.5 μm). There was no difference between actual and predicted time with the two Planmeca models, but with CEREC, the actual time was significantly higher than the predicted time. The 30s had significantly higher actual and predicted times compared to all other models. Across all models, the average milling time was 7.2 min less in standard mode than in detailed mode. CONCLUSIONS: All fit parameters were in an acceptable range. No differences in fit between Planmeca models suggest no effect of spindle number on accuracy. The detailed setting has no improvement in the marginal or internal fit of the restoration, yet it increases milling time. BioMed Central 2020-07-06 /pmc/articles/PMC7339429/ /pubmed/32631333 http://dx.doi.org/10.1186/s12903-020-01181-9 Text en © The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data. |
spellingShingle | Research Article Vág, János Nagy, Zsolt Bocklet, Christopher Kiss, Tamás Nagy, Ákos Simon, Botond Mikolicz, Ákos Renne, Walter Marginal and internal fit of full ceramic crowns milled using CADCAM systems on cadaver full arch scans |
title | Marginal and internal fit of full ceramic crowns milled using CADCAM systems on cadaver full arch scans |
title_full | Marginal and internal fit of full ceramic crowns milled using CADCAM systems on cadaver full arch scans |
title_fullStr | Marginal and internal fit of full ceramic crowns milled using CADCAM systems on cadaver full arch scans |
title_full_unstemmed | Marginal and internal fit of full ceramic crowns milled using CADCAM systems on cadaver full arch scans |
title_short | Marginal and internal fit of full ceramic crowns milled using CADCAM systems on cadaver full arch scans |
title_sort | marginal and internal fit of full ceramic crowns milled using cadcam systems on cadaver full arch scans |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7339429/ https://www.ncbi.nlm.nih.gov/pubmed/32631333 http://dx.doi.org/10.1186/s12903-020-01181-9 |
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