Accuracy of Digital Impression Taking with Intraoral Scanners and Fabrication of CAD/CAM Posts and Cores in a Fully Digital Workflow
Current intraoral scanners (IOS) enable direct impression taking for computer-aided de-sign/computer-aided manufacturing (CAD/CAM) posts and cores (P+C) with subsequent milling out of monolithic materials. The aim of this in vitro study was to systematically investigate the accuracy of CAD/CAM-P+C i...
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| Format: | Article |
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MDPI AG
2022-06-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/12/4199 |
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| author | Robert Leven Alexander Schmidt Roland Binder Marian Kampschulte Jonas Vogler Bernd Wöstmann Maximiliane Amelie Schlenz |
| author_facet | Robert Leven Alexander Schmidt Roland Binder Marian Kampschulte Jonas Vogler Bernd Wöstmann Maximiliane Amelie Schlenz |
| author_sort | Robert Leven |
| collection | DOAJ |
| description | Current intraoral scanners (IOS) enable direct impression taking for computer-aided de-sign/computer-aided manufacturing (CAD/CAM) posts and cores (P+C) with subsequent milling out of monolithic materials. The aim of this in vitro study was to systematically investigate the accuracy of CAD/CAM-P+C in a fully digital workflow, considering different IOS impression methods (Primescan (PRI), Trios4 without (TRI) and with scanpost (TRI+SP)) (Part A), and CAD/CAM milling of zirconium dioxid (ZIR) and resin composite (COM)-P+C (Part B). Five human models were developed in this study. Micro-CT imaging was used as a reference (REF). For Part A, the models were scanned 12 times for each impression method. Then, IOS datasets (n = 180) were superimposed with REF, and scan accuracy was determined using 3D software (GOMInspect). For Part B, one CAD/CAM-P+C (n = 30) was milled for each model, impression method, and material. The triple-scan method was applied using an industrial scanner (ATOS) to determine the accuracy of the fit. Statistical analysis was performed using analysis of variance (ANOVA, <i>p</i> < 0.05). Part A showed for PRI significantly lower accuracy than TRI and TRI+SP (<i>p</i> < 0.05). The data of Part B revealed significantly higher accuracy for ZIR than for COM (<i>p</i> < 0.05). Within the limitations of this study, CAD/CAM-P+C of the ZIR can be recommended for fabrication in a fully digital workflow regarding the accuracy of fit. |
| first_indexed | 2024-03-09T23:11:05Z |
| format | Article |
| id | doaj.art-c08048ca96a34c1f83f93b6364e479a0 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T23:11:05Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-c08048ca96a34c1f83f93b6364e479a02023-11-23T17:44:23ZengMDPI AGMaterials1996-19442022-06-011512419910.3390/ma15124199Accuracy of Digital Impression Taking with Intraoral Scanners and Fabrication of CAD/CAM Posts and Cores in a Fully Digital WorkflowRobert Leven0Alexander Schmidt1Roland Binder2Marian Kampschulte3Jonas Vogler4Bernd Wöstmann5Maximiliane Amelie Schlenz6Department of Prosthodontics, Dental Clinic, Justus Liebig University, Schlangenzahl 14, 35392 Giessen, GermanyDepartment of Prosthodontics, Dental Clinic, Justus Liebig University, Schlangenzahl 14, 35392 Giessen, GermanyDental Laboratory Dental Team, Hauptstrasse 20, 92237 Sulzbach-Rosenberg, GermanyDepartment of Diagnostic and Interventional Radiology, University Hospital, Justus Liebig University, Schubertstrasse 81, 35392 Giessen, GermanyDepartment of Prosthodontics, Dental Clinic, Justus Liebig University, Schlangenzahl 14, 35392 Giessen, GermanyDepartment of Prosthodontics, Dental Clinic, Justus Liebig University, Schlangenzahl 14, 35392 Giessen, GermanyDepartment of Prosthodontics, Dental Clinic, Justus Liebig University, Schlangenzahl 14, 35392 Giessen, GermanyCurrent intraoral scanners (IOS) enable direct impression taking for computer-aided de-sign/computer-aided manufacturing (CAD/CAM) posts and cores (P+C) with subsequent milling out of monolithic materials. The aim of this in vitro study was to systematically investigate the accuracy of CAD/CAM-P+C in a fully digital workflow, considering different IOS impression methods (Primescan (PRI), Trios4 without (TRI) and with scanpost (TRI+SP)) (Part A), and CAD/CAM milling of zirconium dioxid (ZIR) and resin composite (COM)-P+C (Part B). Five human models were developed in this study. Micro-CT imaging was used as a reference (REF). For Part A, the models were scanned 12 times for each impression method. Then, IOS datasets (n = 180) were superimposed with REF, and scan accuracy was determined using 3D software (GOMInspect). For Part B, one CAD/CAM-P+C (n = 30) was milled for each model, impression method, and material. The triple-scan method was applied using an industrial scanner (ATOS) to determine the accuracy of the fit. Statistical analysis was performed using analysis of variance (ANOVA, <i>p</i> < 0.05). Part A showed for PRI significantly lower accuracy than TRI and TRI+SP (<i>p</i> < 0.05). The data of Part B revealed significantly higher accuracy for ZIR than for COM (<i>p</i> < 0.05). Within the limitations of this study, CAD/CAM-P+C of the ZIR can be recommended for fabrication in a fully digital workflow regarding the accuracy of fit.https://www.mdpi.com/1996-1944/15/12/4199post and core techniquedigital dentistrycad-camintraoral scannermonolithic materialsdigital workflow |
| spellingShingle | Robert Leven Alexander Schmidt Roland Binder Marian Kampschulte Jonas Vogler Bernd Wöstmann Maximiliane Amelie Schlenz Accuracy of Digital Impression Taking with Intraoral Scanners and Fabrication of CAD/CAM Posts and Cores in a Fully Digital Workflow Materials post and core technique digital dentistry cad-cam intraoral scanner monolithic materials digital workflow |
| title | Accuracy of Digital Impression Taking with Intraoral Scanners and Fabrication of CAD/CAM Posts and Cores in a Fully Digital Workflow |
| title_full | Accuracy of Digital Impression Taking with Intraoral Scanners and Fabrication of CAD/CAM Posts and Cores in a Fully Digital Workflow |
| title_fullStr | Accuracy of Digital Impression Taking with Intraoral Scanners and Fabrication of CAD/CAM Posts and Cores in a Fully Digital Workflow |
| title_full_unstemmed | Accuracy of Digital Impression Taking with Intraoral Scanners and Fabrication of CAD/CAM Posts and Cores in a Fully Digital Workflow |
| title_short | Accuracy of Digital Impression Taking with Intraoral Scanners and Fabrication of CAD/CAM Posts and Cores in a Fully Digital Workflow |
| title_sort | accuracy of digital impression taking with intraoral scanners and fabrication of cad cam posts and cores in a fully digital workflow |
| topic | post and core technique digital dentistry cad-cam intraoral scanner monolithic materials digital workflow |
| url | https://www.mdpi.com/1996-1944/15/12/4199 |
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