Development of a Quantitative Method to Assess Dental Students' Manual Dexterity in Tooth Cavity Preparation

PURPOSE: This study aims to develop a novel method for objectively assessing dental students' manual dexterity in tooth cavity preparation using 3D technology. MATERIALS AND METHODS: An artificial tooth model compatible with traditional dental simulators was created using 3D scanning and printing technology. The model was designed with a simplified cavity to assess students' manual dexterity in cavity preparation. To validate the new assessment model, it was tested on 10 undergraduate dental students. After the students prepared the cavities, the models were scanned again, and the resulting 3D data were analyzed using open-source software. The assessment score was calculated based on the volume of over-prepared and under-prepared areas. RESULTS: The 3D-printed tooth model was successfully integrated with traditional dental simulators, providing stability and consistency during cavity preparation practice. The assessment results revealed a range of performance levels, with scores ranging from 41.6 - 78.1, and an average score of 60.5. This variation highlights differences in students' manual dexterity and precision in cavity preparation. CONCLUSION: The newly developed tooth model and analysis method successfully enabled the objective evaluation of students' manual dexterity in cavity preparation. This approach offers a standardised and cost-effective alternative to existing evaluation systems, enhancing the consistency and accuracy of assessments in dental education.