Effect of different ergonomic supports on muscle activity of dentists during posterior composite restoration

PeerJ

article

Manuel López-Nicolás¹  José A. García-Vidal²  Francesc Medina-Mirapeix²  Joaquín P. Sánchez-Onteniente³  Juan D. Berná Mestre⁴  Rodrigo Martín-San Agustín⁵  María P. Escolar-Reina² 

[1] Department of Dermatology, Stomatology, Radiology and Physical Medicine, University of Murcia;Department of Physiotherapy, University of Murcia;Department of Ophthalmology, Optometry, Otolaryngology and Pathological Anatomy, University of Murcia;Department of Radiology, Virgen de la Arrixaca University Clinical Hospital;Department of Physiotherapy, University of Valencia

关键词: Musculoskeletal disorders;    Ergonomics;    Electromyography;    Physical therapy modalities;    Dentists;   

DOI  :  10.7717/peerj.8028

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Background The aim of this study was to evaluate the effect of different ergonomic supports on the muscle activity of two trunk muscles while a group of dentists performed a common dental procedure on a phantom head, divided into three tasks. Methods A one-way repeated measures study (ANOVA) was conducted on a group of 36 dentists. The middle trapezius and lumbar erector spinae muscles were measured with and without the use of different ergonomic supports (ergonomic stool, magnification lenses and both) using a portable surface electromyography (sEMG) device. Intraclass correlation coefficients (ICCs) and the absolute standard error of measurement (SEM) were used to establish the reliability of the baseline measures without ergonomic supports. Results The sEMG showed excellent ICCs (ranging from 0.92 to 0.99) and SEM. Bonferroni post hoc tests showed differences between the three ergonomic supports (p < 0.001) in both muscles studied. The lowest muscle activity measurement occurred with the isolated used of magnification lenses. The use of the ergonomic stool increased the muscle activity of the middle trapezius and lumbar erector spinae muscles to a greater extent than the magnification lenses. The combination of the ergonomic stool and the magnification lenses produced a different effect on each muscle.

【 授权许可】

CC BY