Branson B G, Bray K K, Gadbury-Amyot C, Holt L A, Keselyak N T, Mitchell T V, Williams K B
Division of Dental Hygiene, School of Dentistry, University of Missouri-Kansas City, 64108, USA.
J Dent Educ. 2004 Mar;68(3):384-9.
A distinct body of literature supports the association between clinical postures of the dental practitioner and work-related musculoskeletal disorders (WRMD). Several aids or devices have been tested to improve clinical posture in the interest of decreasing WRMD. The use of magnification lenses while performing dental procedures may increase the quality of work and decrease the likelihood of musculoskeletal problems. To date, only anecdotal and personal opinions had existed regarding the benefits of using magnification lenses, and no empirical evidence had authenticated the contention that use of magnification lenses exerts a positive change in operator posture. The objective of this study was to assess the effect magnification lenses had on the posture of dental hygiene students. Using a randomized crossover design, researchers videotaped nineteen senior dental hygiene students performing an intra-oral procedure with and without the use of magnification lenses. The tapes were then evaluated by a panel of five dental hygiene educators calibrated in the use of Branson's Posture Assessment Instrument (PAI). Results of a paired t-test indicate that the posture of the students while wearing magnification lenses was more acceptable (p=.019) than when wearing traditional safety glasses. Results of this study indicate a quantifiable change in acceptability of posture for clinicians wearing magnification lenses and suggest that the use of such lenses in dental education may be warranted.
大量不同的文献支持牙科从业者的临床姿势与工作相关肌肉骨骼疾病（WRMD）之间的关联。为了减少WRMD，人们测试了几种辅助工具或设备来改善临床姿势。在进行牙科手术时使用放大镜可能会提高工作质量并降低肌肉骨骼问题的可能性。迄今为止，关于使用放大镜的益处仅存在轶事和个人观点，尚无实证证据证实使用放大镜会对操作者姿势产生积极改变这一论点。本研究的目的是评估放大镜对牙科卫生专业学生姿势的影响。研究人员采用随机交叉设计，拍摄了19名牙科卫生专业高年级学生在使用和不使用放大镜的情况下进行口腔内操作的视频。然后由五名经过Branson姿势评估工具（PAI）使用校准的牙科卫生教育工作者组成的小组对录像进行评估。配对t检验结果表明，学生佩戴放大镜时的姿势比佩戴传统安全眼镜时更可接受（p = 0.019）。本研究结果表明，佩戴放大镜的临床医生在姿势可接受性方面有可量化的变化，并表明在牙科教育中使用此类镜片可能是有必要的。
