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Kinematic posture analysis of orthodontists in their daily working practice

Kinematische Haltungsanalyse von Kieferorthopäden in der täglichen Arbeitspraxis

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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie Aims and scope Submit manuscript

Abstract

Purpose

The aim of this study is to conduct a kinematic analysis of occupational posture in orthodontists.

Methods

A representative sample of 21 (13 female/8 male) residents in orthodontics and orthodontists was studied. The CUELA system collects kinematic data of the occupational posture. Alongside the kinematic analysis, the tasks performed on-site were also subject to a detailed computerized analysis. Data analysis comprised the evaluation and comparison of joint angle distribution in accordance with ergonomic standards categorized as neutral, moderate or awkward posture.

Results

The most common activities were executed in a seated position. During “treatment” (28% of total time) participants most often worked with a straight back (84.7%), whereas a “bent or twisted” torso posture was observed 23.4% of the time. For head and cervical spine, the 75th and 95th percentiles presented worse (higher) values during treatment as compared to non-orthodontic activities. The seated position next to the patient during treatment showed a stronger inclination of the thoracic spine to the right and an inclination of the lumber spine to the left.

Conclusions

Orthodontists do take characteristic postures during treatment activities with highest angle values. The postures differ in the area of head and cervical spine with regard to the various activities carried out in the 3 categories.

Zusammenfassung

Zielsetzung

In dieser Studie soll eine kinematische Analyse der beruflichen Haltung von Kieferorthopäden durchgeführt werden.

Methoden

In einer repräsentativen Analyse wurden 21 (13 weibliche, 8 männliche) Kieferorthopäden bzw. Weiterbildungsassistenten der Kieferorthopädie untersucht. Mit dem CUELA(computerunterstützte Erfassung und Langzeitanalyse von Belastungen des Muskel-Skelett-Systems)-System wurden kinematische Daten der Arbeitshaltung erfasst. Neben der kinematischen Analyse wurden alle Arbeitstätigkeiten auch einer detaillierten computergestützten Tätigkeitsanalyse unterzogen. Die Datenanalyse umfasste die Auswertung und den Vergleich der Gelenkwinkelverteilung in als nach ergonomischen Maßstäben als neutral, mittel bzw. ungünstig kategorisierter Haltung.

Ergebnisse

Die häufigsten Tätigkeiten wurden im Sitzen ausgeführt. Während der Tätigkeit „Behandlung“ (28 %) arbeiteten die Teilnehmer meist mit geradem Rücken (84,7 %), in 23,4 % wurde eine „verbogene“ oder „verdrehte“ Körperhaltung beobachtet. Bei Kopf und Halswirbelsäule zeigten die 75. und die 95. Perzentile während der Behandlung schlechtere (höhere) Werte als bei nichtkieferorthopädischen Aktivitäten. Die Sitzposition neben dem Patienten während der Behandlung zeigte eine stärkere Neigung der Brustwirbelsäule nach rechts und eine Neigung der Halswirbelsäule nach links.

Schlussfolgerungen

Kieferorthopäden nehmen während der Behandlung charakteristische Körperhaltungen mit hohen Winkelwerten ein. Die Haltungen unterscheiden sich im Bereich von Kopf und Halswirbelsäule hinsichtlich der verschiedenen durchgeführten Aktivitäten in den 3 Kategorien.

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Authors and Affiliations

  1. Institute of Occupational Medicine, Social Medicine and Environmental Medicine, Goethe University, Frankfurt am Main, Theodor-Stern-Kai 7, Building 9A, 60590, Frankfurt am Main, Germany

    I. Hauck, J. Nowak, G. Oremek, D. A. Groneberg &  D. Ohlendorf

  2. School of Dentistry, Department of Orthodontics, University Medical Centre of the Johannes Gutenberg University Mainz, Mainz, Germany

    C. Erbe

  3. Institute for Occupational Health and Safety (IFA), German Social Accident Insurance (DGUV), Sankt Augustin, Germany

    I. Hermanns, D. Ditchen & R. Ellegast

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  1. I. Hauck
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  2. C. Erbe
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  3. J. Nowak
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  4. I. Hermanns
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  5. D. Ditchen
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  6. R. Ellegast
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  8. D. A. Groneberg
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  9. D. Ohlendorf
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Corresponding author

Correspondence to D. Ohlendorf.

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Conflict of interest

I. Hauck, C. Erbe, J. Nowak, I. Hermanns, D. Ditchen, R. Ellegast, G. Oremek, D.A. Groneberg and D. Ohlendorf declare that they have no competing interests.

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Hauck, I., Erbe, C., Nowak, J. et al. Kinematic posture analysis of orthodontists in their daily working practice. J Orofac Orthop 79, 389–402 (2018). https://doi.org/10.1007/s00056-018-0153-1

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