Investigation of digital and conventional methods for verifying the fitness of CAD/CAM crowns on abutments with different shapes
Abstract Purpose To evaluate the marginal and internal compatibility of computer-aided design and computer-aided manufacturing crowns produced via a digital workflow using an intraoral scanner, and to compare this digital-detection technique with the conventional fit test using silicone rubber (sili...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-07-01
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| Series: | International Journal of Implant Dentistry |
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| Online Access: | https://doi.org/10.1186/s40729-025-00632-8 |
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| author | Michi Abe Kazuhiro Kon Shota Fukazawa Hisatomo Kondo |
| author_facet | Michi Abe Kazuhiro Kon Shota Fukazawa Hisatomo Kondo |
| author_sort | Michi Abe |
| collection | DOAJ |
| description | Abstract Purpose To evaluate the marginal and internal compatibility of computer-aided design and computer-aided manufacturing crowns produced via a digital workflow using an intraoral scanner, and to compare this digital-detection technique with the conventional fit test using silicone rubber (silicone-compatibility technique) on various abutments. Methods Implant bodies were placed in the maxillary right central incisor and mandibular right first molar of reference models. Digital scans were acquired using an intraoral scanner, and abutments were prepared. Twenty-four crowns with a cement space of 70 μm were fabricated from the digital file of the abutment. The crown’s inner surface, abutment, and occlusal surface were scanned. The gaps between the crown and abutment were measured using stereoscopic image analysis software based on standard triangulated language data, and the accuracy of the fit was verified using silicone rubber. Results Significant differences (P < 0.05) were observed between the silicone-compatibility and digital-detection techniques for the maxillary central incisor at the incisal edge and the palatal lower region, and for the mandibular first molar at the occlusal surface and the center of lingual axis. The digital-detection technique yielded values closer to 70 μm for the cement space. The values measured using the silicone-compatibility technique exhibited greater variation than those measured using the digital-detection technique. Conclusions The novel digital-detection technique had superior or equivalent performance compared to the silicone-compatibility technique and could be beneficial for verifying crown fitness accuracy. |
| format | Article |
| id | doaj-art-bd2c551cf24f45abb7fd01a8469270e4 |
| institution | Kabale University |
| issn | 2198-4034 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Implant Dentistry |
| spelling | doaj-art-bd2c551cf24f45abb7fd01a8469270e42025-08-20T03:38:13ZengSpringerOpenInternational Journal of Implant Dentistry2198-40342025-07-0111111110.1186/s40729-025-00632-8Investigation of digital and conventional methods for verifying the fitness of CAD/CAM crowns on abutments with different shapesMichi Abe0Kazuhiro Kon1Shota Fukazawa2Hisatomo Kondo3Division of Fixed Prosthodontics and Oral Implantology, Department of Prosthodontics, School of Dentistry, Iwate Medical UniversityDivision of Fixed Prosthodontics and Oral Implantology, Department of Prosthodontics, School of Dentistry, Iwate Medical UniversityDivision of Fixed Prosthodontics and Oral Implantology, Department of Prosthodontics, School of Dentistry, Iwate Medical UniversityDepartment of Fixed Prosthodontics and Oral Implantology, School of Dentistry, Aichi Gakuin UniversityAbstract Purpose To evaluate the marginal and internal compatibility of computer-aided design and computer-aided manufacturing crowns produced via a digital workflow using an intraoral scanner, and to compare this digital-detection technique with the conventional fit test using silicone rubber (silicone-compatibility technique) on various abutments. Methods Implant bodies were placed in the maxillary right central incisor and mandibular right first molar of reference models. Digital scans were acquired using an intraoral scanner, and abutments were prepared. Twenty-four crowns with a cement space of 70 μm were fabricated from the digital file of the abutment. The crown’s inner surface, abutment, and occlusal surface were scanned. The gaps between the crown and abutment were measured using stereoscopic image analysis software based on standard triangulated language data, and the accuracy of the fit was verified using silicone rubber. Results Significant differences (P < 0.05) were observed between the silicone-compatibility and digital-detection techniques for the maxillary central incisor at the incisal edge and the palatal lower region, and for the mandibular first molar at the occlusal surface and the center of lingual axis. The digital-detection technique yielded values closer to 70 μm for the cement space. The values measured using the silicone-compatibility technique exhibited greater variation than those measured using the digital-detection technique. Conclusions The novel digital-detection technique had superior or equivalent performance compared to the silicone-compatibility technique and could be beneficial for verifying crown fitness accuracy.https://doi.org/10.1186/s40729-025-00632-8CAD/CAM technologyDigital scanDimensional accuracyIntraoral scan |
| spellingShingle | Michi Abe Kazuhiro Kon Shota Fukazawa Hisatomo Kondo Investigation of digital and conventional methods for verifying the fitness of CAD/CAM crowns on abutments with different shapes International Journal of Implant Dentistry CAD/CAM technology Digital scan Dimensional accuracy Intraoral scan |
| title | Investigation of digital and conventional methods for verifying the fitness of CAD/CAM crowns on abutments with different shapes |
| title_full | Investigation of digital and conventional methods for verifying the fitness of CAD/CAM crowns on abutments with different shapes |
| title_fullStr | Investigation of digital and conventional methods for verifying the fitness of CAD/CAM crowns on abutments with different shapes |
| title_full_unstemmed | Investigation of digital and conventional methods for verifying the fitness of CAD/CAM crowns on abutments with different shapes |
| title_short | Investigation of digital and conventional methods for verifying the fitness of CAD/CAM crowns on abutments with different shapes |
| title_sort | investigation of digital and conventional methods for verifying the fitness of cad cam crowns on abutments with different shapes |
| topic | CAD/CAM technology Digital scan Dimensional accuracy Intraoral scan |
| url | https://doi.org/10.1186/s40729-025-00632-8 |
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