Department of Orthodontics, RWTH Aachen University, Aachen, Germany.
Interdisciplinary Center for Clinical Research, RWTH Aachen University, Aachen, Germany.
BMC Med Educ. 2021 Aug 24;21(1):447. doi: 10.1186/s12909-021-02848-9.
The quality of root canal treatments performed by undergraduate students is often unsatisfactory questioning the current methods of teaching. Based on treatment errors made by students participating the endodontic courses at RWTH Aachen University (Germany), new radiopaque artificial root canal treatment models (DRSK RCT; incisor, premolar, molar) were designed and developed. The aim of the study was to evaluate these models by groups of students and demonstrators.
A total number of 60 students and seven demonstrators from a single institution (RWTH Aachen) participated in this study. They performed endodontic treatments on either initial versions of the DRSK RCT or modified versions. The initial versions were evaluated by students (n = 25) and demonstrators (n = 7). The obtained questionnaire was conducted as 7-point Likert-Scale covering the topics material properties, feeling while performing exercises and perception of its closeness to reality via 19 items (students) and 21 items (demonstrators). According to the evaluations several alterations were applied to the DRSK RCT, the whole study was repeated and evaluated by different students (n = 35) and the same demonstrators (n = 7). Additionally, the demonstrators blindly evaluated the quality of root canal treatments performed by the students (n = 35) on the modified DRSK RCT. Comparisons between the initial versions and the modified versions were calculated using Chi-squared tests.
Students as well as demonstrators positively evaluated both variants of the DRSK RCT with especially high ratings in the overall evaluation. Students' rating of the pulp anatomy significantly increased from 5.4 ± 1.1 (mean ± SD) to 5.9 ± 0.9 (mean ± SD; p < 0.05) for the modified model. Likewise, students felt that the ability to flare root canals improved after alterations have been applied. Ratings significantly increased from 4.8 ± 1.6 (mean ± SD) to 5.6 ± 1.0 (mean ± SD; p < 0.05).
The results indicate that the DRSK RCT is a promising candidate to be used as an alternative to extracted teeth or as an additional tool for improving dental education. However, some limitations of our analysis have to be considered.
本科生进行的根管治疗质量往往不尽如人意，这对当前的教学方法提出了质疑。基于在德国亚琛工业大学（RWTH Aachen University）参加牙髓课程的学生所犯的治疗错误，设计并开发了新的放射不透明人工根管治疗模型（DRSK RCT；切牙、前磨牙、磨牙）。本研究的目的是通过学生和讲师小组来评估这些模型。
共有来自单一机构（RWTH Aachen）的 60 名学生和 7 名讲师参加了这项研究。他们对 DRSK RCT 的初始版本或修改版本进行根管治疗。学生（n=25）和讲师（n=7）评估了初始版本。获得的问卷以 7 点李克特量表的形式进行，涵盖了 19 个项目（学生）和 21 个项目（讲师）的材料特性、操作时的感觉以及对现实的感知等主题。根据评估结果，对 DRSK RCT 进行了几次修改，然后由不同的学生（n=35）和相同的讲师（n=7）重复并评估整个研究。此外，讲师还对学生（n=35）在改良的 DRSK RCT 上进行的根管治疗质量进行了盲法评估。使用卡方检验比较初始版本和修改版本之间的差异。
学生和讲师都对 DRSK RCT 的两种变体进行了积极评估，总体评估的评分尤其高。学生对牙髓解剖学的评分从初始模型的 5.4±1.1（平均值±标准差）显著增加到改良模型的 5.9±0.9（平均值±标准差；p<0.05）。同样，学生认为在进行修改后，扩大根管的能力有所提高。评分从初始模型的 4.8±1.6（平均值±标准差）显著增加到改良模型的 5.6±1.0（平均值±标准差；p<0.05）。
结果表明，DRSK RCT 是一种很有前途的替代拔牙或作为提高牙科教育的附加工具的候选者。然而，我们的分析存在一些局限性。
