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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

Open Access 27-02-2024 | Original Article

Influence of the design of 3D-printed indirect bonding trays and experience of the clinician on the accuracy of bracket placement

Authors: Dr. Hisham Sabbagh, Lea Hoffmann, Andrea Wichelhaus, Andreas Kessler

Published in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

Abstract

Purpose

The aim was to investigate the influence of three different three-dimensional (3D)-printed bonding tray designs and professional experience on accuracy of indirect bracket placement.

Methods

Virtual bracket placement was performed on a scanned dental model using OnyxCeph software (Image Instruments, Chemnitz, Germany). Three different designs for indirect bonding trays (open, semi-open, and closed design) were created and produced using a 3D printer. To analyze the influence of professional experience, one of the three tray designs was produced twice. In this case, bracket placement was performed by an inexperienced dentist. Bracket positions were scanned after the indirect bonding procedure. Linear and angular transfer errors were measured. Significant differences between the target and actual situation were analyzed using the Kruskal–Wallis and χ² test.

Results

All bonding tray designs resulted in comparable results. The results of the unexperienced dentist showed significantly higher deviations than those for the experienced orthodontist in the torque direction. However, the mean values were comparable. The open tray design exceeded the clinically acceptable limits of 0.25 mm and 1° more often. The inexperienced dentist exceeded these limits significantly more often than the experienced orthodontist in the vertical and torque direction. The immediate bracket loss rate showed no significant differences between the different tray designs. Significantly more bracket losses were observed for the inexperienced dentist during the procedure compared to the experienced orthodontist.

Conclusions

The bonding tray design and professional experience had an influence on the exceedance of clinically relevant limits of positioning accuracy and on the bracket loss rate.

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Title: Influence of the design of 3D-printed indirect bonding trays and experience of the clinician on the accuracy of bracket placement
Authors: Dr. Hisham Sabbagh
Lea Hoffmann
Andrea Wichelhaus
Andreas Kessler
Publication date: 27-02-2024
Publisher: Springer Medizin
Published in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie
Print ISSN: 1434-5293
Electronic ISSN: 1615-6714
DOI: https://doi.org/10.1007/s00056-024-00517-2

At a glance: The STEP trials

Springer Medicine

Influence of the design of 3D-printed indirect bonding trays and experience of the clinician on the accuracy of bracket placement

Abstract

Purpose

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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