Does an Ergonomic Dentist Stool Design Have a Positive Impact on Musculoskeletal Health During Intraoral Scans and Tooth Preparation?

Ji-Min Lee, Keunbada Son, Jin-Wook Kim, Myoung-Uk Jin, Kyu-Bok Lee
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Abstract

Purpose: To evaluate the effects of an ergonomic dentist stool design on muscle activity and fatigue in dentists.

Materials and methods: A total of 14 dentists were recruited, and electrodes were attached to the arm, neck, and shoulder muscles of these dentists according to the surface electromyography (EMG) for the noninvasive assessment of muscles protocol. After measuring the maximal voluntary contraction, eightchannel surface EMG was performed during simulations of two dental procedures (intraoral scanning and tooth preparation) while the dentists were using two types of dentist stools. Furthermore, muscle activity and fatigue were determined based on eight-channel surface EMG data, and ergonomic risk levels were evaluated according to the muscle activity. Shapiro-Wilk test was used to confirm that all data were normally distributed, and Mann-Whitney U test was used to compare the two types of dentist stools (α = .05).

Results: There was a significant difference between the conventional and ergonomically designed dentist stools in terms of the activity of the trapezius descendens muscle (P < .05). Notably, the activity of the trapezius descendens muscle was less when the dentists used ergonomically designed dentist stools than when they used a conventional dentist stool. The activity of all muscles, except for the sternocleidomastoid, indicated moderate ergonomic risk.

Conclusions: A dentist stool that enables dentists to maintain ergonomic posture should be used to prevent musculoskeletal disorders.

在口腔内扫描和牙齿准备期间,符合人体工程学的牙医凳设计对肌肉骨骼健康有积极影响吗?
目的:本研究旨在评估符合人体工程学的牙医凳设计对牙医肌肉活动和疲劳的影响。材料和方法:招募了14名牙医,根据非侵入性肌肉评估方案的表面肌电图将电极附着在这些牙医的手臂、颈部和肩部肌肉上。在测量最大自愿收缩后,在牙医使用两种类型的牙科粪便时,在模拟两种牙科手术(口腔内扫描和牙齿准备)期间进行八通道表面肌电图。此外,根据八通道表面肌电图数据确定肌肉活动和疲劳程度,并根据肌肉活动评估人体工程学风险水平。采用Shapiro-Wilk检验证实所有数据均为正态分布,采用Mann-Whitney U检验比较两种牙便的差异(α = 0.05)。结果:常规口腔粪便与符合人体工程学设计的口腔粪便在斜方肌活动方面差异有统计学意义(p < 0.05)。值得注意的是,当牙医使用符合人体工程学设计的牙医凳时,斜方肌的活动比使用传统的牙医凳时要小。除胸锁乳突肌外,所有肌肉的活动均显示中度人体工程学风险。结论:应使用使牙医保持符合人体工程学姿势的牙医凳来预防肌肉骨骼疾病。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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