Congruence between the meshes of a combined healing abutment-scan body system acquired with four different intraoral scanners and the corresponding library file: An in vitro analysis

Mustafa Borga Donmez; Vinicius Rizzo Marques; Gülce Çakmak; Hakan Yilmaz; Martin Schimmel; Burak Yilmaz

doi:10.1016/j.jdent.2021.103938

Congruence between the meshes of a combined healing abutment-scan body system acquired with four different intraoral scanners and the corresponding library file: An in vitro analysis

J Dent. 2022 Mar:118:103938. doi: 10.1016/j.jdent.2021.103938. Epub 2021 Dec 21.

Authors

Mustafa Borga Donmez¹, Vinicius Rizzo Marques², Gülce Çakmak³, Hakan Yilmaz⁴, Martin Schimmel⁵, Burak Yilmaz⁶

Affiliations

¹ Assistant Professor, Department of Prosthodontics, Biruni University Faculty of Dentistry, Istanbul, Turkey; Visiting Researcher, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Switzerland.
² External Researcher, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.
³ Buser Foundation Scholar for Implant Dentistry, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland. Electronic address: guelce.cakmak@zmk.unibe.ch.
⁴ Orthodontics, Private Practice, Istanbul, Turkey.
⁵ Chairman, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Privat-Docent extra muros, Division of Gerodontology and Removable Prosthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland.
⁶ Associate Professor, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Associate Professor, Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland; Adjunct Professor, Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Ohio, United States.

PMID: 34942277
DOI: 10.1016/j.jdent.2021.103938

Abstract

Objectives: To investigate the congruence between the meshes of a combined healing abutment-scan body (CHA-SB) system acquired with four different intraoral scanners and the corresponding library file.

Material and methods: A CHA-SB was fixed to an implant at the right first molar position in a dentate mandibular model and digitized by using 4 different intraoral scanners (IOSs) [TRIOS 3 (T3), Omnicam (OC), Primescan (PS), and Virtuo Vivo (VV)] (n = 8) and an industrial grade optical scanner (ATOS Core 80) (n = 1) to generate standard tessellation language (STL) files of the test scans (CHA-SB-STLs) and the master reference model scan (MRM-STL). A reverse engineering software (Studio Geomagic X) was used to superimpose the proprietary library file of the CHA-SB over the generated STL files. Root mean square (RMS) values representing the deviations between the library file and the superimposed STL files were statistically analyzed by using 1-way ANOVA (α=0.05). Qualitative analysis of the deviations was performed by visual inspection.

Results: Differences between the congruence of the library file and the CHA-SB scans among different IOSs were nonsignificant (F = 1.619, df= 3, P = .207). The single best result was 29 ± 28.9 µm for OC, 30.8 ± 29.6 µm for VV, 35.6 ± 35.5 µm for T3, and 39.5 ± 39.2 µm for PS, which were all above the deviation value of the scan performed by using the industrial-grade scanner (23.2 ± 23.2 µm).

Conclusion: The dimensional congruence between the library file and the STL file of the CHA-SB system scans was similar when intraoral scanners with different acquisition technologies were used to scan a model with an implant.

Clinical significance: Scans of the tested intraoral scanners may result in crowns with similar positional accuracy, given the similarities in congruence of their scans with the library file.

Keywords: Accuracy; Healing abutment-scan body; Intraoral scanner; Trueness.

MeSH terms

Computer-Aided Design
Dental Implants*
Dental Impression Technique*
Imaging, Three-Dimensional
Models, Dental

Substances

Dental Implants