Fracture resistance of post and core in immediate and delayed post space in trauma simulated teeth

Introduction: This research aims to assess and analyze the fracture resistance of GC Everstick post with separate composite core buildup and Edelweiss prefabricated resin composite post and core single unit into immediate and delayed post space prepared teeth. Methods: A total of 120 extracted human mandibular premolars have been subjected to a standardized protocol of mechanical trauma to simulate tooth fracture. Teeth samples were randomly divided into four groups (n = 30) on the basis of time taken for the preparation of post space (approximately following root canal obturation and 24 h after root canal obturation) for the single unit Edelweiss post and core system and GC post with separate core buildup. Compressive load has been utilized to do the analysis necessary to establish the fracture resistance using a universal testing machine. The fracture force calculated was in Newtons (N), and a stereomicroscope was utilized for investigating the common causes of failure. Results: In an immediate post space prepared tooth, the GC post exhibited a mean failure load of 970.584 N. In contrast, the Edelweiss post, and core system showed a significantly higher mean failure load of 1250.349 N. In delayed post space prepared tooth, the GC Everstick post exhibited a mean failure load of 950.287 N. In contrast, the Edelweiss post, and core system showed a significantly higher mean failure load of 1229.348 N. Conclusion: This study aims to assess and analyze the fracture resistance of the GC Everstick post with separate composite core buildup and the Edelweiss prefabricated resin composite post and core single unit in immediate and delayed post space prepared teeth. The study results showed that the failure modes in both groups were non-catastrophic in nature. These findings suggest that the Edelweiss post and core system may be a more suitable option for restoring teeth that have been subjected to traumatic conditions. The study provides valuable information for dental professionals in their decision-making process for post and core restoration techniques in teeth that have been subjected to trauma.