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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie
Published in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie 2/2018

01-03-2018 | Original Article

Does orthodontic treatment have a permanent effect on tooth color?

A systematic review and meta-analysis

Authors: Rita Kamber, Spyridon N. Papageorgiou, Theodore Eliades

Published in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie | Issue 2/2018

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Abstract

Objectives

Aim of this systematic review was to assess the effect of orthodontic treatment with fixed appliances on the tooth color of patients.

Methods

Nine databases were searched up to May 2017 for clinical cohort studies on the effect of fixed appliance treatment on tooth color. After elimination of duplicate studies, data extraction, and risk of bias assessment according to the Cochrane guidelines, random effects meta-analyses of mean differences (MD) or means and their 95% confidence intervals (CIs) were performed, followed by GRADE (Grading of Recommendations Assessment, Development and Evaluation) assessment of the quality of evidence.

Results

Three nonrandomized and one randomized study with a total of 138 patients (46% male, 54% female) with average age of 15.7 years were included. Tooth color of treated patients was significantly altered during or after orthodontic treatment (4 studies; average of 3.2 ∆E units; 95% CI = 2.0–4.4 ∆E units), which was more than the variation among controls (1 study; MD = 1.9 ∆E units; 95% CI = 1.7–2.2 ∆E units). However, the quality of evidence was very low, due to the inclusion of nonrandomized studies, bias, and imprecision. Re-analysis of raw study data indicated that significant differences in clinically discernable treatment-induced color changes were seen between chemically and light-cured adhesives and among the various tooth categories.

Conclusion

Existing evidence of very low quality indicates that orthodontic treatment might be associated with alterations of tooth color, which are however not consistently clinically discernible. Treatment-induced color alterations might be dependent on bonding material and tooth type, but evidence supporting this is weak.
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Metadata
Title
Does orthodontic treatment have a permanent effect on tooth color?
A systematic review and meta-analysis
Authors
Rita Kamber
Spyridon N. Papageorgiou
Theodore Eliades
Publication date
01-03-2018
Publisher
Springer Medizin
Published in
Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie / Issue 2/2018
Print ISSN: 1434-5293
Electronic ISSN: 1615-6714
DOI
https://doi.org/10.1007/s00056-018-0123-7

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