Department of Conservative Odontology, Faculty of Dentistry, "Iuliu Hațieganu" University of Medicine and Pharmacy Cluj-Napoca, Cluj-Napoca, Romania.
Faculty of Dentistry, "Iuliu Hațieganu" University of Medicine and Pharmacy Cluj-Napoca, Cluj-Napoca, Romania.
Eur J Dent Educ. 2021 Aug;25(3):516-523. doi: 10.1111/eje.12627. Epub 2020 Nov 25.
Dentists are susceptible to musculoskeletal disorders due to prolonged static postures during dental treatments. Using a magnification tool like dental operating microscope (DOM) or the dental loupes may correct the operator's posture. Up until now, few studies have focused on preclinical dental students' posture when working with the DOM, while most of them have focused on the loupes. The aim of this study was to comparatively analyse the working posture of preclinical students during a dental restoration procedure, working with two different magnification methods.
This study used a randomised cross-over design in which seventeen third year students were randomly divided into three groups. The exclusion criteria were previous contact with magnification systems and previous clinical working experience. Each student prepared 3 Black class 1 cavities on artificial lower molars: first with no magnification, following dental loupes and DOM. They were video-recorded throughout the preparation. Trunk, neck and upper-arm position were evaluated using the Posture Assessment Instrument. Students completed a questionnaire on their subjective perception of the two magnification systems.
The statistical analysis showed significant improvement of the working posture using magnification systems compared to direct vision. The biggest improvement was obtained through the use of DOM, followed by the dental loupes. Students perceived dental loupes as being the most comfortable and easy to adapt to. They reported being more focused when using DOM.
Both magnification systems had a positive impact on the working posture, DOM having the best results. Loupes showed better adaptability while DOM showed better concentration.
牙医在进行牙科治疗时，由于长时间保持静态姿势，容易患上肌肉骨骼疾病。使用放大工具，如牙科手术显微镜（DOM）或牙科头灯，可以纠正操作人员的姿势。到目前为止，很少有研究关注使用 DOM 时临床前牙科学生的姿势，而大多数研究都集中在头灯上。本研究旨在比较分析使用两种不同放大方法进行牙科修复时临床前学生的工作姿势。
本研究采用随机交叉设计，将 17 名三年级学生随机分为三组。排除标准为之前接触过放大系统和有临床工作经验。每位学生在人工下磨牙上准备 3 个 Black 类 1 龋洞：首先不使用放大，然后使用牙科头灯和 DOM。在整个准备过程中对他们进行录像。使用姿势评估仪器评估躯干、颈部和上臂的位置。学生们完成了一份关于他们对两种放大系统主观感受的问卷。
统计分析显示，与直接视觉相比，使用放大系统可显著改善工作姿势。使用 DOM 可获得最大的改善，其次是牙科头灯。学生们认为牙科头灯最舒适且易于适应。他们报告说使用 DOM 时更加专注。
两种放大系统都对工作姿势产生了积极影响，DOM 的效果最好。头灯的适应性更好，而 DOM 则更能集中注意力。
