Waligóra Joanna, Ryniewicz Joanna, Bereziewicz Wioletta, Bereziewicz Jakub, Gajdzica Michalina, Pytko-Polończyk Jolanta
Department of Integrated Dentistry, Institute of Dentistry, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland.
Department of Periodontology and Oral Diseases, University Center of Dentistry, Medical University of Warsaw, Poland.
Dent Med Probl. 2025 Jul-Aug;62(4):671-679. doi: 10.17219/dmp/192749.
The preparation of model teeth for prosthetic crowns plays a crucial role in preclinical dental education. Its primary objective is to ensure optimal conditions for training students to function in clinical settings.
The aim of the study was to assess the quality of dental students' education regarding the preparation of model teeth for cast metal-ceramic crowns. An additional objective was to compare the agreement between measurements made by examiners on the model teeth prepared by the students.
A total of 180 model premolar teeth (KaVo) were used for the tests. The teeth were prepared by the third-year dental students, who created a shoulder finish line on the buccal surface and a chamfer finish line on the palatal surface. Two examiners assessed the convergence angles of walls, the margin width of surfaces, the reduction in the height of functional and non-functional cusps, the extent of the preparation, the smoothness of the preparation, and the continuity of the finish line using simple measuring tools.
The students' most proficient parameters were margin width, the extent of the preparation, and the finish line continuity. The least accurate results were observed in the wall convergence angles and the reduction in the height of functional and non-functional cusps. The interexaminer reliability was considerable for convergence angles, the margin width and the reduction in the height of cusps (intraclass correlation coefficient (ICC) >0.75). The examiners demonstrated moderate agreement (kappa: 0.60-0.79) for parameters such as the extent of the preparation, wall smoothness and finish line continuity.
The exercises provided a solid foundation for the students. However, practice and more targeted feedback are necessary to improve performance in the more challenging aspects of tooth preparation. The traditional analytical approach that uses simple measuring tools to assess the tooth preparation procedure is a reproducible method that examiners can use to effectively evaluate students' work.
用于制作修复冠的模型牙制备在临床前牙科教育中起着至关重要的作用。其主要目的是确保为学生在临床环境中操作创造最佳条件。
本研究旨在评估牙科学生关于铸造金属烤瓷冠模型牙制备的教育质量。另一个目的是比较考官对学生制备的模型牙所做测量之间的一致性。
共使用180颗模型前磨牙（卡瓦）进行测试。这些牙齿由三年级牙科学生制备，他们在颊面制作肩台边缘线，在腭面制作斜面边缘线。两名考官使用简单测量工具评估壁的会聚角、表面边缘宽度、功能尖和非功能尖高度的降低、制备范围、制备光滑度以及边缘线的连续性。
学生最熟练掌握的参数是边缘宽度、制备范围和边缘线连续性。在壁会聚角以及功能尖和非功能尖高度降低方面观察到最不准确的结果。对于会聚角、边缘宽度和牙尖高度降低，考官间的可靠性相当高（组内相关系数（ICC）>0.75）。对于制备范围、壁光滑度和边缘线连续性等参数，考官表现出中等程度的一致性（kappa值：0.60 - 0.79）。
这些练习为学生奠定了坚实的基础。然而，为了在牙齿制备更具挑战性的方面提高表现，实践和更有针对性的反馈是必要的。使用简单测量工具评估牙齿制备过程的传统分析方法是一种可重复的方法，考官可用于有效评估学生的工作。
