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Article: Reproducibility of laboratory scanning of multiple implants in complete edentulous arch: Effect of scan bodies

TitleReproducibility of laboratory scanning of multiple implants in complete edentulous arch: Effect of scan bodies
Authors
KeywordsReproducibility
Accuracy
Scan bodies
Digitalization
Complete arch
Issue Date2020
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jdent
Citation
Journal of Dentistry, 2020, v. 96, p. article no. 103329 How to Cite?
AbstractObjectives: To evaluate the reproducibility of complete arch scanning with multiple implant scan bodies using a laboratory scanner. Methods: A master model of edentulous maxillary arch with 6 implants was fabricated. PEEK scan bodies were inserted into the model and consecutively scanned using a dental laboratory scanner (N = 10, Group C). Another 10 scans were performed with each scan body detached and reinserted into the same site between each scan (Group CR). The last group of scanning was performed with the scan bodies detached and randomly repositioned between each scan (N = 10, Group RR). Virtual models were created and the inter-implant distances and angles were measured using an inspection software. Accuracy of the complete arch scans was calculated and compared using Two-Way ANOVA (⍺ = 0.05). Results: Significant greater distance distortion was found in CR (27.6 ± 18.9 μm) and RR (34.2 ± 25.0 μm). No significant difference in angular distortion was found among 3 groups. The greatest distance distortion was found in the anterior and cross-arch region of the arch. The smallest angular distortion was found in the first scanned sextant, with increasing distortion along the scanning path of the arch. The distance precision was significantly reduced in group CR and RR, while the angular precision was significantly reduced in group RR only. Conclusion: Reproducibility of complete arch scanning was significantly affected by repositioning of the scan bodies using a laboratory scanner. Repeated and random repositioning of the scan bodies would decrease the reproducibility of the spatial position and angle of the virtual implant. The distortion appeared to be small and within the clinical tolerance. Clinical significance: High-precision transfer of the implant information from intra-oral environment to dental laboratory is a prerequisite for the success of implant-supported prosthesis. Although laboratory scanners seem to be accurate, their accuracy is also affected by the precision and attachment procedure of the implant scan bodies and that has always been overlooked.
Persistent Identifierhttp://hdl.handle.net/10722/283705
ISSN
2019 Impact Factor: 3.242
2015 SCImago Journal Rankings: 1.029

 

DC FieldValueLanguage
dc.contributor.authorPAN, Y-
dc.contributor.authorTam, JMY-
dc.contributor.authorTsoi, JKH-
dc.contributor.authorLam, WYH-
dc.contributor.authorPow, EHN-
dc.date.accessioned2020-07-03T08:22:57Z-
dc.date.available2020-07-03T08:22:57Z-
dc.date.issued2020-
dc.identifier.citationJournal of Dentistry, 2020, v. 96, p. article no. 103329-
dc.identifier.issn0300-5712-
dc.identifier.urihttp://hdl.handle.net/10722/283705-
dc.description.abstractObjectives: To evaluate the reproducibility of complete arch scanning with multiple implant scan bodies using a laboratory scanner. Methods: A master model of edentulous maxillary arch with 6 implants was fabricated. PEEK scan bodies were inserted into the model and consecutively scanned using a dental laboratory scanner (N = 10, Group C). Another 10 scans were performed with each scan body detached and reinserted into the same site between each scan (Group CR). The last group of scanning was performed with the scan bodies detached and randomly repositioned between each scan (N = 10, Group RR). Virtual models were created and the inter-implant distances and angles were measured using an inspection software. Accuracy of the complete arch scans was calculated and compared using Two-Way ANOVA (⍺ = 0.05). Results: Significant greater distance distortion was found in CR (27.6 ± 18.9 μm) and RR (34.2 ± 25.0 μm). No significant difference in angular distortion was found among 3 groups. The greatest distance distortion was found in the anterior and cross-arch region of the arch. The smallest angular distortion was found in the first scanned sextant, with increasing distortion along the scanning path of the arch. The distance precision was significantly reduced in group CR and RR, while the angular precision was significantly reduced in group RR only. Conclusion: Reproducibility of complete arch scanning was significantly affected by repositioning of the scan bodies using a laboratory scanner. Repeated and random repositioning of the scan bodies would decrease the reproducibility of the spatial position and angle of the virtual implant. The distortion appeared to be small and within the clinical tolerance. Clinical significance: High-precision transfer of the implant information from intra-oral environment to dental laboratory is a prerequisite for the success of implant-supported prosthesis. Although laboratory scanners seem to be accurate, their accuracy is also affected by the precision and attachment procedure of the implant scan bodies and that has always been overlooked.-
dc.languageeng-
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jdent-
dc.relation.ispartofJournal of Dentistry-
dc.subjectReproducibility-
dc.subjectAccuracy-
dc.subjectScan bodies-
dc.subjectDigitalization-
dc.subjectComplete arch-
dc.titleReproducibility of laboratory scanning of multiple implants in complete edentulous arch: Effect of scan bodies-
dc.typeArticle-
dc.identifier.emailTsoi, JKH: jkhtsoi@hku.hk-
dc.identifier.emailLam, WYH: retlaw@hku.hk-
dc.identifier.emailPow, EHN: ehnpow@hku.hk-
dc.identifier.authorityTsoi, JKH=rp01609-
dc.identifier.authorityLam, WYH=rp02183-
dc.identifier.authorityPow, EHN=rp00030-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jdent.2020.103329-
dc.identifier.pmid32251696-
dc.identifier.scopuseid_2-s2.0-85083293872-
dc.identifier.hkuros310660-
dc.identifier.volume96-
dc.identifier.spagearticle no. 103329-
dc.identifier.epagearticle no. 103329-
dc.publisher.placeUnited Kingdom-

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