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Accuracy of Scanned Stock Abutments Using Different Intraoral Scanners: An In Vitro Study

Authors
 Jong-Eun Kim  ;  Young-Sun Hong 1  ;  You-Jung Kang 1  ;  Jee-Hwan Kim 1  ;  June-Sung Shim 1 
Citation
 JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY, Vol.28(7) : 797-803, 2019-08 
Journal Title
 JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY 
ISSN
 1059-941X 
Issue Date
2019-08
MeSH
Computer-Aided Design ; Dental Abutments ; Dental Implants* ; Dental Impression Technique ; Humans ; Mouth, Edentulous*
Keywords
Intraoral scanning ; precision ; stock abutments ; trueness
Abstract
Purpose: To determine the accuracy of a digital manufacturing method for dental implant restorations on stock abutments using intraoral scanners and prefabricated stock-abutment libraries. Materials and methods: Two dental implants with internal hexagonal connections were placed in the mandibular second premolar and second molar areas of a partially edentulous dentoform model; stock abutments with a diameter of 5 mm, abutment height of 5.5 mm, and gingival cuff height of 2 mm were connected. The study model was scanned 10 times using a reference tabletop scanner and 5 types of intraoral scanners (IOSs). The data collected by 5 types of IOSs were divided into 3 groups, based on the type and matching of stock abutment library data: no library, optical library, and contact library groups. A total of 160 data files were analyzed, including reference data. The resulting data were used to evaluate trueness and precision. Results: Trueness and precision values in the group in which library data of the stock abutment were not used were 42.0 to 76.3 µm and 30.5 to 99.7 µm; corresponding values when the library data using an optical scanner were matched were 51.2 to 73.4 µm and 26.3 to 62.8 µm, and those when contact scanner library data were used were 30.1 to 62.4 µm and 15.5 to 55.9 µm. Thus, the accuracy of the contact library group was significantly higher than the accuracies of the no library (p < 0.001) and optical library groups (p < 0.001). Conclusion: The application of prefabricated library data of stock abutments using a contact scanner improved the accuracy of scan data. Scan accuracy of the stock abutments differed significantly based on the type of scanner.
Full Text
https://onlinelibrary.wiley.com/doi/full/10.1111/jopr.13095
DOI
10.1111/jopr.13095
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Prosthodontics (보철과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Jong Eun(김종은) ORCID logo https://orcid.org/0000-0002-7834-2524
Kim, Jee Hwan(김지환) ORCID logo https://orcid.org/0000-0002-0872-4906
Shim, June Sung(심준성) ORCID logo https://orcid.org/0000-0003-1428-0122
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/175865
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