Advanced superimposition method to evaluate the marginal and internal fit of ceramic crowns fabricated using heat pressing techniques
Background Digital technologies can enhance the success of permanent crowns. The present study aimed to evaluate marginal adaptation and internal fit of permanent crowns fabricated using stereolithography (SLA) and digital light processing (DLP) 3D printing technologies following scans using two dif...
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PeerJ Inc.
2025-04-01
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| author | Nasser M. Alqahtani Saurabh Chaturvedi Mohamed Khaled Addas Manar Fahad A. AlQahtani Arwa Ahmed M. Alhudiry Shahrah H. Qahtani Mohammad A. Zarbah Asim Elsir Elmahdi Marco Cicciù Giuseppe Minervini |
| author_facet | Nasser M. Alqahtani Saurabh Chaturvedi Mohamed Khaled Addas Manar Fahad A. AlQahtani Arwa Ahmed M. Alhudiry Shahrah H. Qahtani Mohammad A. Zarbah Asim Elsir Elmahdi Marco Cicciù Giuseppe Minervini |
| author_sort | Nasser M. Alqahtani |
| collection | DOAJ |
| description | Background Digital technologies can enhance the success of permanent crowns. The present study aimed to evaluate marginal adaptation and internal fit of permanent crowns fabricated using stereolithography (SLA) and digital light processing (DLP) 3D printing technologies following scans using two different intraoral scanners (IOS) (Medit i700, shape (TRIOS 3)). Methods Three typodont #14 teeth were prepared for full veneer all ceramic crowns with three types of margins—chamfer (CFL), rounded shoulder (RSFL) and rounded shoulder with bevel (RSBFL). A total of 360 study models were made and divided into two groups based on the type of intraoral scanner used for digital impressions. Group A in which the intraoral scanner MEDIT i700 was used, and Group B in which intraoral scanner TRIOS 3 was used (n = 360/group). The subgroups were made as Medit i700-SLA, Medit i700-DLP, TRIOS 3-SLA and TRIOS 3-DLP (n = 180/subgroup). These were further divided into three sub-subgroups based on the finish lines: CFL, RSFL, and RSBFL (n = 30 each sub-subgroups). All ceramic crowns were made on models and scanned to assess discrepancies (marginal adaptation and internal fit) at nine zones (Z1–Z9). Three-way analysis of variance and pairwise comparison was done (Tukey HSD test) (α = 0.05). Results The mean marginal gap and internal fit values were lowest for Group A-1 with RSBFL in each zone. The intergroup comparison showed values for marginal gap and the internal fit were minimum for Group A-1 for each finish line design, with the lowest for RSBFL at zone Z2 0.04 ±0.001. Conclusions Regardless of the IOS and 3D printing techniques, the smallest gap was observed in RSBFL, followed by RSFL and CFL. The all-ceramic crowns fabricated using a Medit intraoral scanner with an SLA 3DPrinter with a rounded shoulder finish line had the best marginal and internal fit. |
| format | Article |
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| publishDate | 2025-04-01 |
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| spelling | doaj-art-b4e43134c5a740ce98ac12be71f897712025-08-20T03:07:57ZengPeerJ Inc.PeerJ2167-83592025-04-0113e1911710.7717/peerj.19117Advanced superimposition method to evaluate the marginal and internal fit of ceramic crowns fabricated using heat pressing techniquesNasser M. Alqahtani0Saurabh Chaturvedi1Mohamed Khaled Addas2Manar Fahad A. AlQahtani3Arwa Ahmed M. Alhudiry4Shahrah H. Qahtani5Mohammad A. Zarbah6Asim Elsir Elmahdi7Marco Cicciù8Giuseppe Minervini9Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Aseer, Saudi ArabiaDepartment of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Aseer, Saudi ArabiaDepartment of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Aseer, Saudi ArabiaDepartment of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Aseer, Saudi ArabiaDepartment of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Aseer, Saudi ArabiaDepartment of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Aseer, Saudi ArabiaDepartment of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Aseer, Saudi ArabiaDepartment of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Aseer, Saudi ArabiaDepartment of Biomedical and Surgical and Biomedical Sciences, Catania University, Catania, ItalySaveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, Tamil Nadu, IndiaBackground Digital technologies can enhance the success of permanent crowns. The present study aimed to evaluate marginal adaptation and internal fit of permanent crowns fabricated using stereolithography (SLA) and digital light processing (DLP) 3D printing technologies following scans using two different intraoral scanners (IOS) (Medit i700, shape (TRIOS 3)). Methods Three typodont #14 teeth were prepared for full veneer all ceramic crowns with three types of margins—chamfer (CFL), rounded shoulder (RSFL) and rounded shoulder with bevel (RSBFL). A total of 360 study models were made and divided into two groups based on the type of intraoral scanner used for digital impressions. Group A in which the intraoral scanner MEDIT i700 was used, and Group B in which intraoral scanner TRIOS 3 was used (n = 360/group). The subgroups were made as Medit i700-SLA, Medit i700-DLP, TRIOS 3-SLA and TRIOS 3-DLP (n = 180/subgroup). These were further divided into three sub-subgroups based on the finish lines: CFL, RSFL, and RSBFL (n = 30 each sub-subgroups). All ceramic crowns were made on models and scanned to assess discrepancies (marginal adaptation and internal fit) at nine zones (Z1–Z9). Three-way analysis of variance and pairwise comparison was done (Tukey HSD test) (α = 0.05). Results The mean marginal gap and internal fit values were lowest for Group A-1 with RSBFL in each zone. The intergroup comparison showed values for marginal gap and the internal fit were minimum for Group A-1 for each finish line design, with the lowest for RSBFL at zone Z2 0.04 ±0.001. Conclusions Regardless of the IOS and 3D printing techniques, the smallest gap was observed in RSBFL, followed by RSFL and CFL. The all-ceramic crowns fabricated using a Medit intraoral scanner with an SLA 3DPrinter with a rounded shoulder finish line had the best marginal and internal fit.https://peerj.com/articles/19117.pdfDigital dentistryCAD-CAM3D PrintingIntra oral scanAll-ceramic crownPermanent crown |
| spellingShingle | Nasser M. Alqahtani Saurabh Chaturvedi Mohamed Khaled Addas Manar Fahad A. AlQahtani Arwa Ahmed M. Alhudiry Shahrah H. Qahtani Mohammad A. Zarbah Asim Elsir Elmahdi Marco Cicciù Giuseppe Minervini Advanced superimposition method to evaluate the marginal and internal fit of ceramic crowns fabricated using heat pressing techniques PeerJ Digital dentistry CAD-CAM 3D Printing Intra oral scan All-ceramic crown Permanent crown |
| title | Advanced superimposition method to evaluate the marginal and internal fit of ceramic crowns fabricated using heat pressing techniques |
| title_full | Advanced superimposition method to evaluate the marginal and internal fit of ceramic crowns fabricated using heat pressing techniques |
| title_fullStr | Advanced superimposition method to evaluate the marginal and internal fit of ceramic crowns fabricated using heat pressing techniques |
| title_full_unstemmed | Advanced superimposition method to evaluate the marginal and internal fit of ceramic crowns fabricated using heat pressing techniques |
| title_short | Advanced superimposition method to evaluate the marginal and internal fit of ceramic crowns fabricated using heat pressing techniques |
| title_sort | advanced superimposition method to evaluate the marginal and internal fit of ceramic crowns fabricated using heat pressing techniques |
| topic | Digital dentistry CAD-CAM 3D Printing Intra oral scan All-ceramic crown Permanent crown |
| url | https://peerj.com/articles/19117.pdf |
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