SEM Evaluation of the Marginal Accuracy of Zirconia, Lithium Disilicate, and Composite Single Crowns Created by CAD/CAM Method: Comparative Analysis of Different Materials
(1) Background: The objective of this in vitro study is to evaluate the marginal accuracy of crowns created by CAD/CAM. (2) Methods: A customized chrome-cobalt (Cr-Co) implant abutment simulating a maxillary right first molar was fixed in a hemi-maxillary stone model and scanned. In total, 27 crowns...
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MDPI AG
2023-03-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/6/2413 |
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| author | Francesco Ferrini Gaetano Paolone Giovanna Laura Di Domenico Nicolò Pagani Enrico Felice Gherlone |
| author_facet | Francesco Ferrini Gaetano Paolone Giovanna Laura Di Domenico Nicolò Pagani Enrico Felice Gherlone |
| author_sort | Francesco Ferrini |
| collection | DOAJ |
| description | (1) Background: The objective of this in vitro study is to evaluate the marginal accuracy of crowns created by CAD/CAM. (2) Methods: A customized chrome-cobalt (Cr-Co) implant abutment simulating a maxillary right first molar was fixed in a hemi-maxillary stone model and scanned. In total, 27 crowns were fabricated, including 9 lithium disilicate crowns, 9 composite crowns, and 9 zirconia crowns. The measurements were determined by scanning electron microscopy. Descriptive analysis was performed using the mean and standard deviation, while the Kruskal–Wallis test was performed to determine whether the marginal discrepancies were significantly different between each group (<i>p</i> < 0.05). (3) Results: The lowest marginal gap value was reported for zirconia (21.45 ± 12.58 µm), followed by composite (44.7 ± 24.96 µm) and lithium disilicate (62.28 ± 51.8 µm). The Kruskal–Wallis tests revealed a statistically significant difference (<i>p</i>-value < 0.05) in the mean marginal gaps between different materials. (4) Conclusions: The proposed digital workflow can be a viable alternative for fixed prosthetic rehabilitations. The best performance in terms of marginal gap was achieved by zirconia crowns, but all three materials demonstrate marginal closure below the clinically accepted threshold value (120 µm). Clinical significance: although significant differences were reported, the investigated CAD/CAM materials showed clinically acceptable marginal gaps. |
| first_indexed | 2024-03-11T06:15:39Z |
| format | Article |
| id | doaj.art-c5bb5f6b0f1142a2b45aad627e4620a5 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T06:15:39Z |
| publishDate | 2023-03-01 |
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| series | Materials |
| spelling | doaj.art-c5bb5f6b0f1142a2b45aad627e4620a52023-11-17T12:21:56ZengMDPI AGMaterials1996-19442023-03-01166241310.3390/ma16062413SEM Evaluation of the Marginal Accuracy of Zirconia, Lithium Disilicate, and Composite Single Crowns Created by CAD/CAM Method: Comparative Analysis of Different MaterialsFrancesco Ferrini0Gaetano Paolone1Giovanna Laura Di Domenico2Nicolò Pagani3Enrico Felice Gherlone4Dental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, 20132 Milan, ItalyDental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, 20132 Milan, ItalyOral Surgery School, Vita-Salute San Raffaele University, 20132 Milan, ItalyDental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, 20132 Milan, ItalyDental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, 20132 Milan, Italy(1) Background: The objective of this in vitro study is to evaluate the marginal accuracy of crowns created by CAD/CAM. (2) Methods: A customized chrome-cobalt (Cr-Co) implant abutment simulating a maxillary right first molar was fixed in a hemi-maxillary stone model and scanned. In total, 27 crowns were fabricated, including 9 lithium disilicate crowns, 9 composite crowns, and 9 zirconia crowns. The measurements were determined by scanning electron microscopy. Descriptive analysis was performed using the mean and standard deviation, while the Kruskal–Wallis test was performed to determine whether the marginal discrepancies were significantly different between each group (<i>p</i> < 0.05). (3) Results: The lowest marginal gap value was reported for zirconia (21.45 ± 12.58 µm), followed by composite (44.7 ± 24.96 µm) and lithium disilicate (62.28 ± 51.8 µm). The Kruskal–Wallis tests revealed a statistically significant difference (<i>p</i>-value < 0.05) in the mean marginal gaps between different materials. (4) Conclusions: The proposed digital workflow can be a viable alternative for fixed prosthetic rehabilitations. The best performance in terms of marginal gap was achieved by zirconia crowns, but all three materials demonstrate marginal closure below the clinically accepted threshold value (120 µm). Clinical significance: although significant differences were reported, the investigated CAD/CAM materials showed clinically acceptable marginal gaps.https://www.mdpi.com/1996-1944/16/6/2413CAD/CAMcompositedigital impressionlithium disilicatemarginal accuracyscanner |
| spellingShingle | Francesco Ferrini Gaetano Paolone Giovanna Laura Di Domenico Nicolò Pagani Enrico Felice Gherlone SEM Evaluation of the Marginal Accuracy of Zirconia, Lithium Disilicate, and Composite Single Crowns Created by CAD/CAM Method: Comparative Analysis of Different Materials Materials CAD/CAM composite digital impression lithium disilicate marginal accuracy scanner |
| title | SEM Evaluation of the Marginal Accuracy of Zirconia, Lithium Disilicate, and Composite Single Crowns Created by CAD/CAM Method: Comparative Analysis of Different Materials |
| title_full | SEM Evaluation of the Marginal Accuracy of Zirconia, Lithium Disilicate, and Composite Single Crowns Created by CAD/CAM Method: Comparative Analysis of Different Materials |
| title_fullStr | SEM Evaluation of the Marginal Accuracy of Zirconia, Lithium Disilicate, and Composite Single Crowns Created by CAD/CAM Method: Comparative Analysis of Different Materials |
| title_full_unstemmed | SEM Evaluation of the Marginal Accuracy of Zirconia, Lithium Disilicate, and Composite Single Crowns Created by CAD/CAM Method: Comparative Analysis of Different Materials |
| title_short | SEM Evaluation of the Marginal Accuracy of Zirconia, Lithium Disilicate, and Composite Single Crowns Created by CAD/CAM Method: Comparative Analysis of Different Materials |
| title_sort | sem evaluation of the marginal accuracy of zirconia lithium disilicate and composite single crowns created by cad cam method comparative analysis of different materials |
| topic | CAD/CAM composite digital impression lithium disilicate marginal accuracy scanner |
| url | https://www.mdpi.com/1996-1944/16/6/2413 |
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