Zhang Rui, Tang Renjie, Spintzyk Sebastian, Tian Yuting, Xiang Yong, Xu Yichen, Hu Tao
State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, Department of Preventive Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
ADMiRE Research Center-Additive Manufacturing, Intelligent Robotics, Sensors and Engineering, School of Engineering and IT, Carinthia University of Applied Sciences, Europastraße 4, 9524 Villach, Austria.
Dent J (Basel). 2023 Sep 11;11(9):213. doi: 10.3390/dj11090213.
Ledge formation presents a significant challenge in endodontic treatment. Yet, there is still a lack of educational tooth models for hands-on practice. This study aimed to create and evaluate a tooth model for ledge management practice. A natural tooth with curved roots was collected for scientific use under ethics committee approval. Following initial root canal preparation, the tooth was scanned using micro-computed tomography (μCT) and 3D reconstructed. A K-file, created via computer-aided design (CAD), was partly inserted into the root canal wall of the 3D reconstructed tooth. By subtracting the K-file from the tooth, a tooth model with a root canal ledge was produced. The model was then 3D printed for a hands-on workshop. An eight-item Likert-scale questionnaire was administered to 20 postgraduate students and 10 endodontists to assess the model's quality and training effectiveness. In addition, the success rate of bypassing and correcting the root canal ledge was documented. The feedback from both the students and experts was positive, and the results of the Mann-Whitney U test indicated no statistically significant differences found between the two groups ( > 0.05). The success rate of the students and the experts was 85% and 100%, respectively. In future applications, this novel tooth model is expected to address the existing gap in endodontic education and provide benefits for dental practitioners.
在根管治疗中，台阶形成是一个重大挑战。然而，目前仍缺乏用于实践操作的教育用牙齿模型。本研究旨在创建并评估一种用于台阶处理实践的牙齿模型。在伦理委员会批准下，收集了一颗牙根弯曲的天然牙齿以供科学研究使用。在进行初步根管预备后，使用微型计算机断层扫描（μCT）对该牙齿进行扫描并进行三维重建。通过计算机辅助设计（CAD）创建的K锉部分插入三维重建牙齿的根管壁中。通过从牙齿中减去K锉，制作出带有根管台阶的牙齿模型。然后将该模型进行3D打印，用于实践工作坊。向20名研究生和10名牙髓病医生发放了一份包含8个条目的李克特量表问卷，以评估该模型的质量和培训效果。此外，记录绕过并纠正根管台阶的成功率。学生和专家的反馈均为积极，曼-惠特尼U检验结果表明两组之间无统计学显著差异（>0.05）。学生和专家的成功率分别为85%和100%。在未来的应用中，这种新型牙齿模型有望弥补根管治疗教育中的现有差距，并为牙科从业者带来益处。
