Corcodel N, Krisam J, Klotz A-L, Deisenhofer U K, Stober T, Hassel A J, Rammelsberg P, Zenthöfer A
Department of Prosthetic Dentistry, University of Heidelberg, Heidelberg, Germany.
Institute of Biostatistics and Medical Biometry, University of Heidelberg, Heidelberg, Germany.
Eur J Dent Educ. 2018 Aug;22(3):e582-e587. doi: 10.1111/eje.12355. Epub 2018 Apr 17.
To evaluate the effect of small-group education including practical training on dental students' shade determination performance compared with a control group.
Sixty-three non-colour-blind preclinical students were asked to participate and belonged to an intervention (n = 31) and a control (n = 32) group, respectively. All students received a lecture on dental shade determination. The members of the intervention group were educated and practically trained in small groups in addition. Ten volunteers, each with unrestored upper right middle and lateral incisors, were recruited. The students of both the intervention and control groups were then asked to determine the colour of the volunteers' test teeth using the 3D-Master shade guide (Vita Zahnfabrik, Bad Säckingen, Germany) under artificial daylight illumination. For analytical purposes, the CIE Lab* coordinates were obtained using a spectrophotometer. Colour differences, ΔE, between all shade tabs selected by the students and the natural teeth were calculated. ΔE observed in the intervention and control groups were compared using t tests. In addition, a multi-level regression model was adjusted for age and gender.
Mean (SD) ΔE between the shade tabs selected by the students and the natural teeth in the intervention and control groups were 3.8 (2.1) and 4.3 (2.3), respectively (P < .001). The effect of group membership was reproduced in multivariate analysis whereas age and gender did not reach statistical significance.
With more intensive education and practical training the ability to perform clinical shade determinations improved for students without previous clinical experience. The results obtained support the idea of implementing thematic small-group education in the dental curriculum.
与对照组相比，评估包括实践培训在内的小组教育对牙科学生比色表现的影响。
63名非色盲临床前学生被要求参与，分别属于干预组（n = 31）和对照组（n = 32）。所有学生都接受了关于牙科比色的讲座。干预组的成员还额外接受了小组教育和实践培训。招募了10名志愿者，每人右上中切牙和侧切牙均未修复。然后要求干预组和对照组的学生在人工日光照明下使用3D-Master比色板（德国巴德萨克京的维他齿科公司）确定志愿者测试牙齿的颜色。为了分析目的，使用分光光度计获得CIE Lab*坐标。计算学生选择的所有比色片与天然牙齿之间的颜色差异ΔE。使用t检验比较干预组和对照组中观察到的ΔE。此外，针对年龄和性别调整了多层次回归模型。
干预组和对照组学生选择的比色片与天然牙齿之间的平均（标准差）ΔE分别为3.8（2.1）和4.3（2.3）（P <.001）。在多变量分析中重现了分组的影响，而年龄和性别未达到统计学意义。
通过更强化的教育和实践培训，对于没有临床经验的学生，临床比色能力有所提高。获得的结果支持在牙科课程中实施主题小组教育的想法。
