Objective: This in vitro study was designed to assess the impact of varying coring thicknesses on the extent and orientation of tooth movement during complete denture fabrication. Materials and methods: Standardized maxillary and mandibular complete denture wax-ups were fabricated and divided into four groups based on coring thickness (1 mm, 1.5 mm, 2 mm, and 2.5 mm). Coring was achieved using vacuum-formed thermoplastic sheets of predetermined thickness adapted over the occlusal surfaces. A total of 112 samples (n = 28 per group) were processed using conventional heat-cured polymethyl methacrylate (PMMA) denture base resin. Pre- and post-processing intermolar distances were measured using a digital caliper, and tooth movement was analyzed using one-way ANOVA with Bonferroni post hoc tests. Results: Tooth movement was observed in all groups; however, a significant difference was noted between the groups. Group A exhibited the lowest degree of tooth displacement, followed by Groups B, C, and D. Decreasing the coring thickness showed a statistically significant reduction in tooth movement, particularly in the anteroposterior (p<0.05) movement. Conclusion: Within the scope of the present study, it was inferred that a 1 mm thickness of coring was found to be the ideal coring thickness. This suggests that incorporating optimal coring thickness may enhance the accuracy and stability of complete dentures.
Kadunganari et al. (Thu,) studied this question.