Microleakage in immediate vs delayed post space preparation in root canals filled with bioceramic-based root canal sealer

Abstract

Aim: The objective of this study was to compare the microleakage rate between immediate and delayed post space preparation in the root canal filled with the bioceramic-based root canal sealer by the fluid filtration technique. Material and methods: Sixty extracted human mandibular premolars were used. The coronal portion was resected 12 mm from the apex, and the root canal was prepared with Mtwo NiTi rotary instruments to apical size 50/0.04 and filled with a matched-taper gutta-percha impregnated with bioceramic particles and a bioceramic-based root canal sealer. The samples were divided into two experimental groups (n = 50) and two groups of positive (n = 5) and negative control groups (n = 5). Twenty-five roots of the immediate post space preparation group were prepared post space immediately following completion of root canal obturation and 25 roots of delayed post space preparation group were kept for 7 days before preparation of the post space. Evaluation of the apical leakage was performed with a fluid filtration method under a 15 cm H2O pressure. Results: There was no significant difference (p = 0.55) in apical microleakage between immediate and delayed post space preparation groups. Conclusion: In terms of apical microleakage, immediate and delayed post space preparation produced similar outcomes when the root canal filled with bioceramic-based root canal sealers by a single-cone technique. Clinical significance: The timing of post space preparation does not affect the apical microleakage results when the root canal filled with bioceramic-based root canal sealers by a single-cone technique.