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Changes in EEG oscillatory patterns due to acute stress caused by orthodontic correction

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The manuscript presents a pilot study of the impact of orthodontic intervention on the brain electrical activity. The orthodontic treatment is a powerful factor of both physiological influence on the jaw system and the surrounding tissues of the head and stress influence. All practically healthy subjects of the same age category (18–25 years) were distributed among three groups based on the method of orthodontic treatment. Group 1 included patients using braces, groups 2 and 3 included patients using aligners in which pressure was applied to 3–5 or 1–2 teeth, respectively. Brain activity electroencephalographic data were collected twice during neurophysiological monitoring: before and after orthodontic correction. The collected data sets included EEG signals from the occipital region of the brain. Numerical processing was performed based on continuous wavelet analysis to estimate the number and duration of oscillatory patterns in narrow frequency bands from 1 to 50 Hz. An assessment of the oscillatory brain activity demonstrated that different grades of correction intensity, regarding the dentition and occlusion, lead to uniform changes in the oscillatory patterns assessed by the electroencephalography in the occipital lobe. Comparison of the number of oscillatory patterns in the groups showed significant changes in the high-frequency \(\bigcup _\textrm{HF} \ni \left\{ \left[ 16;18\right] , \left[ 20;28\right] , \left[ 32;34\right] , \left[ 42;50\right] \right\}\) Hz. The number of patterns in the \(\bigcup _\textrm{HF}\)-band increases when using the most intense bracket devices; while in cases of more gentle correction based on aligner systems, it remains unchanged or even decreases. The independent clustering procedure by assessing changes in oscillatory processes of \(\bigcup _\textrm{HF}\)-band occurring in a single occipital O1-canal made it possible to divide the data array into three clusters. The clusters of changes in brain activity correspond to clinical groups of patients. Thus, different types of dental exposure lead to significantly different changes in the brain activity of patients.

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Data availability

The datasets generated and analyzed during the current study are available from the corresponding author on reasonable request.


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The authors are very grateful to Dr. Sc. Alexander S. Fedonnikov, Vice-Rector for Research at V. I. Razumovsky Saratov State Medical University, for help in organization of the survey and clinical recordings of volunteers.


Study is carried out within the framework of the state task of the Russian Federation’s Ministry of Health #056-00030-21-01 dated 02052021 “Theoretical and experimental study of the integrative activity of various physiological systems of patient under stress” (the State registration number # 121030900357-3).

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Conceptualization MZ; funding acquisition AR, and AK; data curation DaS, MS, RN, RP, resources RP, DmS; project administration AR and MZ; supervision AR and AK; software MZ, RN; investigation RP, DaS, DmS; methodology MZ, AR; validation MS; visualization RN; writing—review and editing MZ, DaS, RP, AR, MS, RN, AK, and DmS.

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Correspondence to Maksim Zhuravlev.

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Zhuravlev, M., Suetenkova, D., Parsamyan, R. et al. Changes in EEG oscillatory patterns due to acute stress caused by orthodontic correction. Eur. Phys. J. Spec. Top. (2023).

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