Graduate student, Department of Dental Science, Graduate School, Kyungpook National University, Daegu, Republic of Korea.
Professor, Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea.
J Prosthet Dent. 2020 May;123(5):747-752. doi: 10.1016/j.prosdent.2019.05.026. Epub 2019 Oct 4.
Dental computer-aided design (CAD) software programs are essential elements of the digital workflow. Therefore, it is necessary to study the learning effect of dental CAD software programs for efficient use.
The purpose of this in vitro study was to predict the learning curve of dental CAD software programs according to dental personnel by using the Wright model and to investigate the tendency of dental personnel to reduce working time according to repeated learning.
A total of 36 participants were recruited, including an equal number of dentists, dental technicians, and dental students (12 each). A custom abutment design was evaluated by using exocad CAD and Deltanine CAD software programs. The design was carried out in the following order: 4 steps repeated 3 times each. This study applied the formula of the Wright model to predict 500 repetitive times. In the statistical analysis, 3-repetition and 500-repetition times were analyzed with the Kruskal-Wallis H test and Friedman test (α=.05), and a post hoc comparison was performed by using the Mann-Whitney U-test and Bonferroni correction method (α=.017).
Three repetitions resulted in shorter working time in the dental technician group. The 3-repetition time decreased statistically for all dental personnel (P<.001). The time for 500 repetitions showed a statistically significant difference according to the type of dental personnel (P=.036), but no significant difference was found after the fourth iteration (fifth iteration: P=.076). Furthermore, the estimated time of 500 iterations decreased statistically significantly from the first to the 500th iteration (P<.001).
All dental personnel showed learning effects of dental CAD software programs. Although the dental technician group initially showed less working time, after initial learning, the same learning effect appeared, regardless of the type of dental personnel.
牙科计算机辅助设计（CAD）软件程序是数字化工作流程的重要组成部分。因此，有必要研究牙科 CAD 软件程序的学习效果，以实现高效使用。
本体外研究旨在根据牙科人员使用 Wright 模型预测牙科 CAD 软件程序的学习曲线，并研究牙科人员根据反复学习减少工作时间的趋势。
共招募了 36 名参与者，包括牙医、牙科技师和牙科学生各 12 名。使用 exocad CAD 和 Deltanine CAD 软件程序评估定制基台设计。设计按以下顺序进行：重复 4 步，每次重复 3 次。本研究应用 Wright 模型的公式预测 500 次重复。在统计分析中，采用 Kruskal-Wallis H 检验和 Friedman 检验（α=.05）对 3 次重复和 500 次重复时间进行分析，并用 Mann-Whitney U 检验和 Bonferroni 校正法（α=.017）进行事后比较。
三次重复使牙科技师组的工作时间更短。所有牙科人员的 3 次重复时间均有统计学意义（P<.001）。500 次重复时间根据牙科人员的类型有统计学意义（P=.036），但第四次迭代后无显著差异（第五次迭代：P=.076）。此外，从第 1 次迭代到第 500 次迭代，500 次迭代的估计时间有统计学意义地减少（P<.001）。
所有牙科人员均表现出对牙科 CAD 软件程序的学习效果。尽管牙科技师组最初的工作时间较短，但在初始学习后，无论牙科人员的类型如何，都会出现相同的学习效果。
