The accuracy of single implant scans with a healing abutment-scanpeg system compared with the scans of a scanbody and conventional impressions: An in vitro study

Burak Yilmaz; Diogo Gouveia; Vinicius Rizzo Marques; Emre Diker; Martin Schimmel; Samir Abou-Ayash

doi:10.1016/j.jdent.2021.103684

The accuracy of single implant scans with a healing abutment-scanpeg system compared with the scans of a scanbody and conventional impressions: An in vitro study

J Dent. 2021 Jul:110:103684. doi: 10.1016/j.jdent.2021.103684. Epub 2021 May 4.

Authors

Burak Yilmaz¹, Diogo Gouveia², Vinicius Rizzo Marques³, Emre Diker⁴, Martin Schimmel⁵, Samir Abou-Ayash⁶

Affiliations

¹ Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3007 Bern, Switzerland; Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3007 Bern, Switzerland; Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, OH, 43210, USA. Electronic address: burak.yilmaz@zmk.unibe.ch.
² Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, OH, 43210, USA. Electronic address: Gouveia.5@osu.edu.
³ Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3007 Bern, Switzerland. Electronic address: marqvr@gmail.com.
⁴ The Ohio State University, College of Dentistry, Division of Restorative and Prosthetic Dentistry, Columbus, OH, USA; Ankara University, Faculty of Dentistry Department of Prosthodontics, Ankara, Turkey. Electronic address: emrediker@outlook.com.
⁵ Department of Reconstructive Dentistry and Gerodontology, University of Bern, Freiburgstrasse 7, 3007 Bern, Switzerland; Extra Muros, Division of Gerodontology and Removable Prosthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland. Electronic address: martin.schimmel@zmk.unibe.ch.
⁶ Department of Reconstructive Dentistry and Gerodontology, University of Bern, Freiburgstrasse 7, 3007 Bern, Switzerland. Electronic address: samir.abou-ayash@zmk.unibe.ch.

PMID: 33961938
DOI: 10.1016/j.jdent.2021.103684

Abstract

Purpose: To compare the accuracy of polyvinylsiloxane (PVS) impressions and intraoral scans when a healing abutment-scanpeg system (HASP) or a conventional scanbody (CSB) was used on a single implant.

Materials and methods: A maxillary model with an implant (4.0 × 11 mm) (Neoss) and a CSB or an HASP (Neoss) was scanned by using a laboratory scanner (Ceramill Map 600; Amann Girrbach) (reference scans) and an intraoral scanner (Trios 3) (n = 10). PVS open-tray impressions were also made and stone casts of the model with a CSB were digitized with the laboratory scanner. Intraoral scanner and cast scans were superimposed to their reference scans. On superimposed scans, points were selected on HASP and CSB to calculate distance deviations (at points 1-4) and angular deviations (at points 5 and 6 on CSB and PVS, and 5-8 on HASP) between scans (trueness), and their variation (precision). The deviation data was analyzed with ANOVA and pairwise comparisons (trueness) with Tukey's adjustment, and F-tests (precision).

Results: At point 1, PVS had lower trueness than CSB (difference in means (DIMs) = 0.184 mm, p = 0.006) and HASP (DIMs = 0.122 mm, p = 0.042). At point 3, CSB had higher trueness than HASP (DIMs = 0.134 mm, p = 0.001). Angular deviations with PVS were higher than with CSB (DIMs = 0.6°, p = 0.013) and HASP (DIMs = 0.7°, p = 0.005). CSB had higher precision than PVS (p < 0.05). HASP had higher precision than PVS for distance (Point 1)(p < 0.001) and angular deviations (p < 0.05). Deviation differences within the HASP parts were not significant.

Conclusion: The accuracy of intraoral scans and PVS impressions of an implant was similar.

Clinical relevance: The combined healing abutment-scanpeg system and the conventional scanbody can be recommended for scans of anterior single implants with the intraoral scanner used.

Keywords: Accuracy; Healing abutment; Precision; Scanbody; Scanpeg; Trueness.

MeSH terms

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

Substances

Dental Implants