Dang Steven, Wink Cherie, Yang Susan Meishan, Lin Kairong, Takesh Thair, Habib Ali A, Wilder-Smith Petra
Beckman Laser Institute, Department of Surgery, University of California Irvine School of Medicine, Irvine, CA 92612, USA.
Department of Neurology, University of California Irvine School of Medicine, Orange, CA 92868, USA.
Dent J (Basel). 2024 Sep 21;12(9):296. doi: 10.3390/dj12090296.
Dental instrumentation with hand-held devices is associated with discomfort, fatigue and musculoskeletal diseases or repetitive stress injuries. The goal of this in vivo study was to determine the effect of an ergonomic handle sheath on muscle work, comfort and fatigue associated with (a) piezoelectric scaling by hygienists with and without musculoskeletal disorders (MSDs), and (b) dental cavity preparation by healthy dentists using a dental micromotor. Two groups of ten hygienists each tested the piezoelectric scaler. Hygienists in Group 1 had no MSDs, while those in Group 2 had been diagnosed with MSDs. Additionally, ten dentists with no MSDs used a dental micromotor to prepare four standardized cavities. Time-based work in four muscles, comfort and fatigue were recorded in the presence and absence of an add-on soft, insulating handle sheath. Data were analyzed using a repeated measures analysis of variance model with Tukey's post-hoc test. Comfort, fatigue and muscle work were significantly better for both devices when the sheath was used. While hygienists with MSDs used more muscle work to complete the set scaling task, and the sheath-related reduction in work was somewhat greater, these MSD-related differences did not quite reach significance. The results of this pilot study show that the ergonomic performance of an ultrasonic scaler and a dental micromotor may be improved by the use of an ergonomic handle sheath.
使用手持器械进行牙科治疗会带来不适、疲劳以及肌肉骨骼疾病或重复性压力损伤。这项体内研究的目的是确定符合人体工程学的手柄护套对以下方面相关的肌肉工作、舒适度和疲劳的影响：(a) 有或没有肌肉骨骼疾病 (MSD) 的口腔卫生员进行压电洁治，以及 (b) 健康牙医使用牙科微型电机进行牙洞制备。两组各有十名口腔卫生员测试了压电洁牙器。第1组的口腔卫生员没有MSD，而第2组的卫生员被诊断患有MSD。此外，十名没有MSD的牙医使用牙科微型电机制备四个标准化牙洞。在有和没有附加的柔软绝缘手柄护套的情况下，记录四块肌肉基于时间的工作情况、舒适度和疲劳程度。使用带有Tukey事后检验的重复测量方差分析模型对数据进行分析。当使用护套时，两种器械的舒适度、疲劳度和肌肉工作情况都明显更好。虽然患有MSD的口腔卫生员在完成既定的洁治任务时使用了更多的肌肉力量，并且护套带来的工作量减少幅度更大，但这些与MSD相关的差异并未达到显著水平。这项初步研究的结果表明，使用符合人体工程学的手柄护套可以改善超声波洁牙器和牙科微型电机的人体工程学性能。
