Kinematic posture analysis of orthodontists in their daily working practice

Hauck, Imke; Erbe, Christina; Nowak, Jennifer; Hermanns, Ingo; Ditchen, Dirk; Ellegast, Rolf; Oremek, G. M.; Groneberg, David A.; Ohlendorf, Daniela

doi:10.1007/s00056-018-0153-1

Cited by 8 publications

(2 citation statements)

References 24 publications

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“…The group of experienced dentists had a more pronounced thoracic and lumbar angle. The changes in the simulated working posture could be explained by the instructions in which the test person had to bend ventrally with the upper body and hold an object in front of the sternum [3,27,52,53]; the arms were consequently moved forward resulting in an increased distance between the shoulder blades [26,60]. All other parameters of the posture comparison were not clinically relevant due to the differences being too small in the data and were, therefore, negligible.…”

Section: Discussionmentioning

confidence: 99%

Influence of design of dentist’s chairs on body posture for dentists with different working experience

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Maurer-Grubinger

et al. 2021

BMC Musculoskelet Disord

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Background Musculoskeletal disorders (MSD) are a common health problem among dentists. Dental treatment is mainly performed in a sitting position. The aim of the study was to quantify the effect of different ergonomic chairs on the sitting position. In addition, it was tested if the sitting position of experienced workers is different from a non-dental group. Methods A total of 59 (28 m/31f) subjects, divided into two dentist groups according to their work experience (students and dentists (9 m/11f) < 10 years, dentists (9 m/10f) ≥ 10 years) and a control group (10 m/10f) were measured. A three-dimensional back scanner captured the bare back of all subjects sitting on six dentist’s chairs of different design. Initially, inter-group comparisons per chair, firstly in the habitual and secondly in the working postures, were carried out. Furthermore, inter-chair comparison was conducted for the habitual as well as for the working postures of all subjects and for each group. Finally, a comparison between the habitual sitting posture and the working posture for each respective chair (intra-chair comparison) was conducted (for all subjects and for each group). In addition, a subjective assessment of each chair was made. For the statistical analysis, non-parametric tests were conducted and the level of significance was set at 5%. Results When comparing the three subject groups, all chairs caused a more pronounced spinal kyphosis in experienced dentists. In both conditions (habitual and working postures), a symmetrical sitting position was assumed on each chair. The inter-chair comparisons showed no differences regarding the ergonomic design of the chairs. The significances found in the inter-chair comparisons were all within the measurementerror and could, therefore, be classified as clinically irrelevant. The intra-chair comparison (habitual sitting position vs. working sitting position) illustrated position-related changes in the sagittal, but not in the transverse, plane. These changes were only position-related (forward leaned working posture) and were not influenced by the ergonomic sitting design of the respective chair. There are no differences between the groups in the subjective assessment of each chair. Conclusions Regardless of the group or the dental experience, the ergonomic design of the dentist’s chair had only a marginal influence on the upper body posture in both the habitual and working sitting postures. Consequently, the focus of the dentist’s chair, in order to minimize MSD, should concentrate on adopting a symmetrical sitting posture rather than on its ergonomic design.

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Section: Discussionmentioning

confidence: 99%

Influence of design of dentist’s chairs on body posture for dentists with different working experience

Huppert

Betz

Maurer-Grubinger

et al. 2021

BMC Musculoskelet Disord

Self Cite

View full text Add to dashboard Cite

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“…Besides studies based on the use of electromyography (Blanc et al, 2014; McNee et al, 2013), there are only few motion capture data on work-related musculoskeletal strain and related MSDs in dentistry available (Garcia & Campos, 2013; Golchha et al, 2014; Park et al, 2015; Rafie et al, 2015). For example, Ohlendorf et al (Hauck et al, 2018; Nowak et al, 2016; Ohlendorf et al, 2016; 2017; D. Ohlendorf, C. Erbe, Nowak, et al, 2017) studied body postures of dentists or orthodontists during their day-to-day tasks in a field trial by means of a personally attached motion capturing (CUELA system).…”

Section: Introductionmentioning

confidence: 99%

Ergonomic Risk Assessment of Oral and Maxillofacial Surgeons – RULA Applied to Objective Kinematic Data

et al. 2022

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Background The prevalence of musculoskeletal disorders is high in oral and maxillofacial surgeons (OS) due to their static and contorted working positions. Hence, the aim of this study was to conduct posture analyses in this specific group of dental professionals using the Rapid Upper Limb Assessment (RULA). Methods In total, 15 (12 m/3 f) OS participated in this study. An inertial motion capture system (Xsens) was used to collect kinematic data during a simulated workflow. Computer-based routines calculated the RULA score for the extracted joint angles at each defined time point. Then, an analysis of the time-dependent RULA scores by body regions was conducted. Key variables were the relative occurrence of specific RULA scores during the complete workflow, individual subtasks, and for treatment of each of the four different dental quadrants. The subtasks and dental quadrants were compared using the Friedman test. Results The total median RULA score represented a high risk for OS during their work (7), including the temporal component (OS spent 77.54% of their working time with a RULA score of 7). The wrists and hands, elbows, lower arms, and the neck were exposed to postures with the highest risk for musculoskeletal strain. Discussion For OS, both the right and the left assisting hand were heavily strained while working on the first dental quadrant caused the most unfavorable postures for OS.

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Gesundheitliche Risikofaktoren der Berufsbilder Zahnarzt/Zahnärztin und Zahnmedizinische Fachangestellte

et al. 2022

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ZusammenfassungDieser Beitrag beschäftigt sich mit Arbeitsabläufen und physischen Risikofaktoren von Zahnärzt/innen (ZA) und Zahnmedizinischen Fachangestellten (ZFA), die zu gesundheitlichen Schäden des Muskel-Skelett-Systems führen. Dabei soll besonders auf das Arbeitsfeld „Patientenmund“ sowie die Arbeitsbelastung und deren Auswirkung auf die Gesundheit eingegangen werden. Ferner werden die optimale Sitzhaltung und physische Anforderungen statischer und repetitiver Behandlungspositionen sowie -haltungen von ZA und ZFA diskutiert.

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Kinematic posture analysis of orthodontists in their daily working practice

Abstract: 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.

Cited by 8 publications

References 24 publications

Influence of design of dentist’s chairs on body posture for dentists with different working experience

Influence of design of dentist’s chairs on body posture for dentists with different working experience

Ergonomic Risk Assessment of Oral and Maxillofacial Surgeons – RULA Applied to Objective Kinematic Data

Gesundheitliche Risikofaktoren der Berufsbilder Zahnarzt/Zahnärztin und Zahnmedizinische Fachangestellte

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