Journal article

Publication year: 2023

Pages: 273-283

Journal: Clinical Oral Investigations

Volume number: 27

Issue number: 1

ISSN: 1432-6981

eISSN: 1436-3771

Open access status: Hybrid

DOI Link: https://doi.org/10.1007/s00784-022-04721-5

Publisher: Springer

Abstract: 

Objectives The aim of this in vitro study was to investigate the influence of fixed orthodontic appliances (FOAs) on the transfer accuracy of full-arch impressions by five intraoral scanners (IOSs): CS3600, Primescan, Trios 4, Medit i500, Emerald S, and one conventional alginate impression (CAI).

Materials and methods To compare the data with the actual model situation, an established reference aid-based method was applied. A test model with human teeth was used and modified for each testing group, resulting in five different settings: natural teeth (group A), metal brackets without/with wire (groups B/C), ceramic brackets without/with wire (groups D/E). A total of 300 (n = 12 x 5 x 5) scan datasets of IOSs were analyzed using a 3D software (GOM Inspect) and 60 (n = 12 x 5) plaster casts of CAI were measured with a coordinate measurement machine. The deviations between the reference aid and the impressions were determined.

Results For all groups with brackets (B to E), IOSs showed a higher transfer accuracy compared to CAI, even for long-span distances. However, some significant differences between the IOSs were observed (p < 0.05).

Conclusions Within the limitations of this in vitro study, IOSs can be recommended for impressions with and without FOAs, even if CAI showed the smallest average deviations in settings without FOAs.

Harvard Citation style: Schlenz, M., Klaus, K., Schmidt, A., Wostmann, B., Mersmann, M., Ruf, S., et al. (2023) The transfer accuracy of digital and conventional full-arch impressions influenced by fixed orthodontic appliances: a reference aid-based in vitro study, Clinical Oral Investigations, 27(1), pp. 273-283. https://doi.org/10.1007/s00784-022-04721-5

APA Citation style: Schlenz, M., Klaus, K., Schmidt, A., Wostmann, B., Mersmann, M., Ruf, S., & Bock, N. (2023). The transfer accuracy of digital and conventional full-arch impressions influenced by fixed orthodontic appliances: a reference aid-based in vitro study. Clinical Oral Investigations. 27(1), 273-283. https://doi.org/10.1007/s00784-022-04721-5