Effect of measurement techniques and operators on measured deviations in digital implant scans

Gülce Çakmak; Mustafa Borga Donmez; Canan Akay; Marcella Silva de Paula; Francesco Guido Mangano; Samir Abou-Ayash; Burak Yilmaz

doi:10.1016/j.jdent.2022.104388

Effect of measurement techniques and operators on measured deviations in digital implant scans

J Dent. 2023 Mar:130:104388. doi: 10.1016/j.jdent.2022.104388. Epub 2022 Dec 8.

Authors

Gülce Çakmak¹, Mustafa Borga Donmez², Canan Akay³, Marcella Silva de Paula⁴, Francesco Guido Mangano⁵, Samir Abou-Ayash¹, Burak Yilmaz⁶

Affiliations

¹ Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.
² Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Department of Prosthodontics, Istinye University, Faculty of Dentistry, Istanbul, Turkey. Electronic address: mustafa-borga.doenmez@unibe.ch.
³ Department of Prosthodontics, Faculty of Dentistry, Eskisehir Osmangazi University, Eskisehir, Turkey; Translational Medicine Research and Clinical Center, Eskisehir Osmangazi University, Eskisehir, Turkey.
⁴ Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Universidade Federal de Goiás, Department of Prevention and Oral Rehabilitation, Goiânia, GO, Brasil.
⁵ Department of Pediatric, Preventive Dentistry and Orthodontics, Sechenov First State Medical University, Moscow, Russia.
⁶ Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland; Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, OH, USA.

PMID: 36502966
DOI: 10.1016/j.jdent.2022.104388

Abstract

Objectives: To evaluate the effect of different measurement techniques and operators on measured deviations in vitro implant scans.

Methods: A 2-piece system that comprises a healing abutment (HA) and a scan body (SB) was mounted onto an implant at right first molar site of a polymethylmethacrylate mandibular dentate model. Model was digitized by using an industrial scanner (reference model scan, n = 1) and an intraoral scanner (test scan, n = 20). All standard tessellation language files were imported into a 3-dimensional analysis software and superimposed. Three operators with similar experience performed circle-based and point-based deviation analyses (n = 20). Deviations measured with different techniques were compared with paired samples t-test within each operator, while the reliability of the operators was assessed by using F-tests for both technqiues (α = 0.05).

Results: Point-based technique resulted in lower deviations than circle-based technique for all operators (P = .001) with to higher reliability among operators (ICC = 0.438, P = .001). The correlation among the operators was nonsignificant when circle-based technique was used (ICC = 0.114, P = .189).

Conclusion: Lower deviations were detected with the point-based technique. In addition, different operators' measurements had higher correlation when point-based technique was used compared with circle-based technique.

Clinical significance: Point-based technique may be preferred over circle-based technique for research studies on scan accuracy of implants, given its higher reliability. The accuracy of measured deviations may increase if the number of planes are increased, which can facilitate point generation at different surfaces of the scan body.

Keywords: Deviation; Digital implant scan; Measurement technique; Operator.

MeSH terms

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

Substances

Dental Implants