The effect of scanned area on the accuracy and time of anterior single implant scans: An in vitro study

Burak Yilmaz; Vinicius Rizzo Marques; Xiaohan Guo; Diogo Gouveia; Samir Abou-Ayash

doi:10.1016/j.jdent.2021.103620

The effect of scanned area on the accuracy and time of anterior single implant scans: An in vitro study

J Dent. 2021 Jun:109:103620. doi: 10.1016/j.jdent.2021.103620. Epub 2021 Feb 26.

Authors

Burak Yilmaz¹, Vinicius Rizzo Marques², Xiaohan Guo³, Diogo Gouveia⁴, Samir Abou-Ayash⁵

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 Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Freiburgstrass 7, 3007 Bern, Switzerland. Electronic address: marqvr@gmail.com.
³ Division of Biostatistics, College of Public Health, The Ohio State University, Columbus, OH, USA. Electronic address: Guo.1280@osu.edu.
⁴ Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, OH 43210, USA. Electronic address: Gouveia.5@osu.edu.
⁵ Department of Reconstructive Dentistry and Gerodontology, University of Bern, Freiburgstrasse 7, 3007 Bern, Switzerland. Electronic address: samir.abou-ayash@zmk.unibe.ch.

PMID: 33647374
DOI: 10.1016/j.jdent.2021.103620

Abstract

Objectives: To investigate the effect of scanned area on the accuracy and scan time of intraoral scans of an anterior implant.

Materials and methods: Three operators experienced in intraoral scanning (at least 2-year experience) performed partial and complete-arch scans (n = 10) of a dentate resin model with an implant at left central incisor site by using an intraoral scanner (Trios3; 3Shape, Copenhagen, Denmark). Each partial- or complete-arch scan was superimposed to a reference scan from a laboratory scanner (Ceramill Map 600; Amann Girrbach AG). Mean distance (selected 7 points) and angular (mesiodistal and buccolingual) scanbody deviations in test scans (trueness) and their variance (precision) were calculated. Linear-regressions (trueness), two-sided F-tests with a Bonferroni correction (precision), and multiple linear regressions (scan time), with the operator as a covariate were applied (alpha = .05).

Results: Interactions were found between the scanned area and the operator for their effect on trueness of all points and angles, except for point 6 at implant-abutment connection in mesiodistal plane (p < .05). No significant difference was found between the precision of partial and complete-arch scans for all operators (p > .05). Partial-arch scan times were significantly shorter, overall, and for each operator (p < .001). No significant effect of scan time was found on the trueness of partial- and complete-arch scans (p > .05).

Conclusions: Partial and complete-arch scans of anterior single implants with an intraoral scanner resulted in similar accuracies, and were not influenced by the operator or the scan time. Scan times of partial-arch scans were significantly shorter.

Clinical significance: Partial-arch scans can be used for the fabrication of monolithic anterior single implant crowns because the scans can be completed in shorter times without compromising the accuracy.

Keywords: Accuracy; Implant crown; Implant scan; Intraoral scan; Operator influence.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

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