Sharon C. Siegel, DDS, MS, MBA, is Professor, Department of Prosthodontics, College of Dental Medicine, Nova Southeastern University; Steven B. Kramer, MS, PhD, is Associate Professor, Department of Decision Sciences, H. Wayne Huizenga College of Business and Entrepreneurship, Nova Southeastern University; and Kimberly M. Deranek, MS, PhD, is Associate Professor, Department of Decision Sciences, H. Wayne Huizenga College of Business and Entrepreneurship, Nova Southeastern University.
J Dent Educ. 2019 Sep;83(9):1081-1091. doi: 10.21815/JDE.019.100. Epub 2019 Apr 22.
Dental education is incorporating computer-assisted design/computer-assisted manufacturing (CAD/CAM) into patient care delivery. The aim of this study was to determine if lean production methods applied to the preclinical phase of dental education would reduce the students' time (efficiency) to complete CAD/CAM indirect restorations (CAD/CAM IR) without compromising the desired quality of the CAD/CAM tooth preparations (effectiveness). In 2016, all third-year students at one U.S. dental school were randomly assigned to control and research groups (approximately 33 per group). The control group was taught using existing methods, while the course was redesigned to incorporate lean methods for the research group. Cycle times of the CAD/CAM IR process for both groups were collected and statistically analyzed to compare the effectiveness of the redesign. Standardized grading forms and tools were used to assess the quality of the CAD/CAM tooth preparations. The research group demonstrated significantly faster preparation times with both crowns and onlays (p<0.05) than the control group. The research group also produced CAD/CAM crown and onlay designs at a significantly faster pace than the control group (p<0.05). There was no significant difference between the control and research groups associated with the scanning process times (p>0.05) nor in the quality of the CAD/CAM tooth preparations (p>0.05). This study demonstrated that lean methods applied to pedagogy significantly decreased preparation and design times in a CAD/CAM restorative dentistry course without compromising the quality of the CAD/CAM tooth preparations.
牙科教育正在将计算机辅助设计/计算机辅助制造（CAD/CAM）纳入患者护理服务中。本研究旨在确定在牙科教育的临床前阶段应用精益生产方法是否会减少学生完成 CAD/CAM 间接修复体（CAD/CAM IR）的时间（效率），同时不影响 CAD/CAM 牙预备的所需质量（效果）。2016 年，美国一所牙科学校的所有三年级学生被随机分配到对照组和研究组（每组约 33 人）。对照组采用现有的方法进行教学，而研究组的课程则重新设计以纳入精益方法。收集并统计分析了两组 CAD/CAM IR 过程的循环时间，以比较重新设计的效果。使用标准化的评分表和工具评估 CAD/CAM 牙预备的质量。研究组的牙冠和嵌体预备时间明显快于对照组（p<0.05）。研究组制作 CAD/CAM 牙冠和嵌体设计的速度也明显快于对照组（p<0.05）。与对照组相比，研究组在扫描过程时间（p>0.05）和 CAD/CAM 牙预备质量（p>0.05）方面没有显著差异。本研究表明，将精益方法应用于教学可显著缩短 CAD/CAM 修复牙科课程中的预备和设计时间，同时不影响 CAD/CAM 牙预备的质量。
