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Article: A novel post-processing strategy to improve the accuracy of complete-arch intraoral scanning for implants: An in vitro study

TitleA novel post-processing strategy to improve the accuracy of complete-arch intraoral scanning for implants: An in vitro study
Authors
Keywords3-D imaging
Computer-aided design
Dental implants
Dimensional measurement accuracy
Edentulous
Issue Date22-Oct-2023
PublisherElsevier
Citation
Journal of Dentistry, 2023, v. 139 How to Cite?
Abstract

Objectives

To develop a new post-processing strategy that utilizes an auxiliary device to adjust intraoral scans and improve the accuracy of 3D models of complete-arch dental implants.

Materials and methods

An edentulous resin model with 6 dental implants was prepared. An auxiliary device, consisting of an opaque base and artificial landmarks, was fabricated and mounted onto the resin model. Twenty intraoral scans (raw scans) were taken using this setup. A new post-processing strategy was proposed to adjust the raw scans using reverse engineering software (verified group). Additionally, ten conventional gypsum casts were duplicated and digitized using a laboratory scanner. The linear and angular trueness and precision of the models were evaluated and compared. The effect of the proposed strategy on the accuracy of complete-arch intraoral scans was analyzed using one-way ANOVA.

Results

The linear trueness (29.7 µm) and precision (24.8 µm) of the verified group were significantly better than the raw scans (46.6 µm, 44.7 µm) and conventional casts (51.3 µm, 36.5 µm), particularly in cross-arch sites. However, the angular trueness (0.114°) and precision (0.085°) of the conventional casts were significantly better than both the verified models (0.298°, 0.168°) and the raw scans (0.288°, 0.202°).

Conclusions

The novel post-processing strategy is effective in enhancing the linear accuracy of complete-arch implant IO scans, especially in cross-arch sites. However, further improvement is needed to eliminate the angular deviations.

Clinical significance

Errors generated from intraoral scanning in complete edentulous arches exceed the clinical threshold. The elimination of stitching errors in the raw scans particularly in the cross-arch sites, through the proposed post-processing strategy would enhance the accuracy of complete-arch implant prostheses.


Persistent Identifierhttp://hdl.handle.net/10722/339171
ISSN
2023 Impact Factor: 4.8
2023 SCImago Journal Rankings: 1.313
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorPan, Y-
dc.contributor.authorDai, X-
dc.contributor.authorWan, F-
dc.contributor.authorSong, C-
dc.contributor.authorTsoi, JKH-
dc.contributor.authorPow, EHN-
dc.date.accessioned2024-03-11T10:34:25Z-
dc.date.available2024-03-11T10:34:25Z-
dc.date.issued2023-10-22-
dc.identifier.citationJournal of Dentistry, 2023, v. 139-
dc.identifier.issn0300-5712-
dc.identifier.urihttp://hdl.handle.net/10722/339171-
dc.description.abstract<h3>Objectives</h3><p>To develop a new post-processing strategy that utilizes an auxiliary device to adjust intraoral scans and improve the accuracy of 3D models of complete-arch dental implants.</p><h3>Materials and methods</h3><p>An edentulous resin model with 6 dental implants was prepared. An auxiliary device, consisting of an opaque base and artificial landmarks, was fabricated and mounted onto the resin model. Twenty intraoral scans (raw scans) were taken using this setup. A new post-processing strategy was proposed to adjust the raw scans using reverse engineering software (verified group). Additionally, ten conventional gypsum casts were duplicated and digitized using a laboratory scanner. The linear and angular trueness and precision of the models were evaluated and compared. The effect of the proposed strategy on the accuracy of complete-arch intraoral scans was analyzed using one-way ANOVA.</p><h3>Results</h3><p>The linear trueness (29.7 µm) and precision (24.8 µm) of the verified group were significantly better than the raw scans (46.6 µm, 44.7 µm) and conventional casts (51.3 µm, 36.5 µm), particularly in cross-arch sites. However, the angular trueness (0.114°) and precision (0.085°) of the conventional casts were significantly better than both the verified models (0.298°, 0.168°) and the raw scans (0.288°, 0.202°).</p><h3>Conclusions</h3><p>The novel post-processing strategy is effective in enhancing the linear accuracy of complete-arch implant IO scans, especially in cross-arch sites. However, further improvement is needed to eliminate the angular deviations.</p><h3>Clinical significance</h3><p>Errors generated from intraoral scanning in complete edentulous arches exceed the clinical threshold. The elimination of stitching errors in the raw scans particularly in the cross-arch sites, through the proposed post-processing strategy would enhance the accuracy of complete-arch implant prostheses.</p>-
dc.languageeng-
dc.publisherElsevier-
dc.relation.ispartofJournal of Dentistry-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subject3-D imaging-
dc.subjectComputer-aided design-
dc.subjectDental implants-
dc.subjectDimensional measurement accuracy-
dc.subjectEdentulous-
dc.titleA novel post-processing strategy to improve the accuracy of complete-arch intraoral scanning for implants: An in vitro study-
dc.typeArticle-
dc.identifier.doi10.1016/j.jdent.2023.104761-
dc.identifier.scopuseid_2-s2.0-85174836972-
dc.identifier.volume139-
dc.identifier.isiWOS:001105818500001-
dc.identifier.issnl0300-5712-

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