Effect on undergraduate student self-confidence in using 3D printed primary molars for root canal treatment simulation training

Purpose The main purpose of this study was to assess the effect of a root canal treatment (RCT) practical simulation-based session using 3D printed primary molars on the self-confidence of fourth-year undergraduate dental students. Our study was also designed to explore student experiences with both manual and rotary RCT procedures and to investigate the association between the self-confidence in undertaking an RCT and the quality of the RCT. Methods Student global self-confidence in undertaking an RCT on a healthy, cooperative child aged 4–5 years was evaluated 2 h before, 1 month after, and 11 months after the simulation training session. Once each instrumental procedure had been completed, the students were also asked to score the level of confidence (specific self-confidence) they felt regarding the use of RP and MP. After each training session, the quality of the RCT was radiographically evaluated by two trained, independent investigators. Results Overall, student global self-confidence in undertaking an RCT increased significantly immediately after the practical session and remained stable for the ensuing eleven months. The students declared a clear preference for RP and were more self-confident in undertaking an RCT after RP than after MP. The proportion of RCTs considered of good quality was the same for the manual (31.5%) and rotary (30.3%) procedures. Conclusions Simulation training is a good way to train dental students who are confident in undertaking RCTs. However, confidence is not directly related to competence. Teachers should be encouraged to develop a comprehensive simulation training program, including feedback, debriefing, and repetitions.