Accuracy of digital impressions for three-unit and four-unit implant supported fixed dental prostheses using a novel device
Background/ purpose: Accuracy of digital implant impressions was considered questionable due to the lack of anatomical reference points between implants and the similarities in scan body morphology, which lead to the purpose of this research is to propose a simple and convenient technique to improve...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-04-01
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| Series: | Journal of Dental Sciences |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1991790222002665 |
| _version_ | 1797862186338484224 |
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| author | Tzu-Yung Kao Min-Chieh Hsieh Chi-Pin Hsu Chi-Chun Liao Chih-Ling Chang |
| author_facet | Tzu-Yung Kao Min-Chieh Hsieh Chi-Pin Hsu Chi-Chun Liao Chih-Ling Chang |
| author_sort | Tzu-Yung Kao |
| collection | DOAJ |
| description | Background/ purpose: Accuracy of digital implant impressions was considered questionable due to the lack of anatomical reference points between implants and the similarities in scan body morphology, which lead to the purpose of this research is to propose a simple and convenient technique to improve the accuracy of scanning. Materials and methods: Four implant analogues (teeth: 15, 17, 24, and 27) were inserted into a stone model of a partially edentulous maxilla; two implants were inserted on each side, creating a three-unit span and a four-unit span. The model was scanned using a 3Shape E4 dental laboratory scanner for reference and a TRIOS 3 intraoral scanner for testing. Each side was scanned 10 times, both with and without the novel device attached to the scan bodies. The trueness and precision of interimplant distances (linear deviations), and interimplant angulations (angle deviations) between the scan bodies were determined using software. A Mann–Whitney U test was used to determine statistical differences between subgroups. Results: Significant differences were discovered in the trueness of angular deviations (−0.20° ± 0.15° vs. −0.01° ± 0.11º) and precision of linear deviations (11.14 ± 6.35 vs. 3.10 ± 2.14 μm) for the four-unit groups. Conclusion: The novel device significantly improved scanning accuracy for a four-unit groups (approximately 22.93 mm) compared to three-unit groups. |
| first_indexed | 2024-04-09T22:15:09Z |
| format | Article |
| id | doaj.art-7af8da96ba0b4f2a9a992c6053eed10b |
| institution | Directory Open Access Journal |
| issn | 1991-7902 |
| language | English |
| last_indexed | 2024-04-09T22:15:09Z |
| publishDate | 2023-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Dental Sciences |
| spelling | doaj.art-7af8da96ba0b4f2a9a992c6053eed10b2023-03-23T04:35:07ZengElsevierJournal of Dental Sciences1991-79022023-04-01182702708Accuracy of digital impressions for three-unit and four-unit implant supported fixed dental prostheses using a novel deviceTzu-Yung Kao0Min-Chieh Hsieh1Chi-Pin Hsu2Chi-Chun Liao3Chih-Ling Chang4Department of Prosthodontics, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, TaiwanDepartment of Prosthodontics, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, TaiwanHigh Speed 3D Printing Research Center, National Taiwan University of Science and Technology, Taipei, TaiwanJien Shin Dental Laboratory, Taipei, TaiwanDepartment of Prosthodontics, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan; School of Dentistry, National Yang-Ming Chiao Tung University, Taipei, Taiwan; Corresponding author. Department of Prosthodontics, Shin Kong Wu Ho-Su Memorial Hospital, B1F., No. 95, Wen Chang Road, Shih Lin District, Taipei, 11101, Taiwan.Background/ purpose: Accuracy of digital implant impressions was considered questionable due to the lack of anatomical reference points between implants and the similarities in scan body morphology, which lead to the purpose of this research is to propose a simple and convenient technique to improve the accuracy of scanning. Materials and methods: Four implant analogues (teeth: 15, 17, 24, and 27) were inserted into a stone model of a partially edentulous maxilla; two implants were inserted on each side, creating a three-unit span and a four-unit span. The model was scanned using a 3Shape E4 dental laboratory scanner for reference and a TRIOS 3 intraoral scanner for testing. Each side was scanned 10 times, both with and without the novel device attached to the scan bodies. The trueness and precision of interimplant distances (linear deviations), and interimplant angulations (angle deviations) between the scan bodies were determined using software. A Mann–Whitney U test was used to determine statistical differences between subgroups. Results: Significant differences were discovered in the trueness of angular deviations (−0.20° ± 0.15° vs. −0.01° ± 0.11º) and precision of linear deviations (11.14 ± 6.35 vs. 3.10 ± 2.14 μm) for the four-unit groups. Conclusion: The novel device significantly improved scanning accuracy for a four-unit groups (approximately 22.93 mm) compared to three-unit groups.http://www.sciencedirect.com/science/article/pii/S1991790222002665AccuracyDigital impressionIntraoral scan bodyIntraoral scanner |
| spellingShingle | Tzu-Yung Kao Min-Chieh Hsieh Chi-Pin Hsu Chi-Chun Liao Chih-Ling Chang Accuracy of digital impressions for three-unit and four-unit implant supported fixed dental prostheses using a novel device Journal of Dental Sciences Accuracy Digital impression Intraoral scan body Intraoral scanner |
| title | Accuracy of digital impressions for three-unit and four-unit implant supported fixed dental prostheses using a novel device |
| title_full | Accuracy of digital impressions for three-unit and four-unit implant supported fixed dental prostheses using a novel device |
| title_fullStr | Accuracy of digital impressions for three-unit and four-unit implant supported fixed dental prostheses using a novel device |
| title_full_unstemmed | Accuracy of digital impressions for three-unit and four-unit implant supported fixed dental prostheses using a novel device |
| title_short | Accuracy of digital impressions for three-unit and four-unit implant supported fixed dental prostheses using a novel device |
| title_sort | accuracy of digital impressions for three unit and four unit implant supported fixed dental prostheses using a novel device |
| topic | Accuracy Digital impression Intraoral scan body Intraoral scanner |
| url | http://www.sciencedirect.com/science/article/pii/S1991790222002665 |
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