Vertical root fracture resistance and crack formation of root canal-treated teeth restored with different post-luting systems

• DOI: 10.1007/s10266-022-00709-5
• Publication Date: 2022-05-06T20:05:00Z
• Authors: Andreas Rathke; Henry Frehse; Beatrice Hrusa
• Keywords: Periodontal fiber

The aim was to investigate the vertical root fracture (VRF) resistance and crack formation of canal-treated teeth restored with different post-luting systems. Human maxillary lateral incisors similar size were decoronated, assigned five groups (n = 18, power 0.9) embedded in acrylic blocks artificial periodontal ligament. After canal filling, post spaces prepared place coated fiber-reinforced composite (FRC) or sandblasted titanium (Ti) posts same shape size. Half zinc phosphate cemented (C), while other half adhesively luted (A). Untreated served as control. thermal cycling staircase loading a chewing simulator, on dentin surface microscopically examined classified no defect, craze line, crack, horizontal crack. Subsequently, samples loaded until fracture. Data analyzed by one-way ANOVA, Tukey's test, Fisher's exact test. All survived simulation without VRF, but significantly between (P 0.009). control showed fewer defects than FRC/C, Ti/C, Ti/A 0.001, P 0.008, respectively). FRC/C highest incidence cracks. FRC/A had lowest defects. There significant difference VRF 0.265). Adhesively FRC did not increase reduced risk Most lines