Abstract
BACKGROUND: "Furcation perforation" is a procedural mishap that can compromise endodontic success. An ideal repair material must exhibit strong "dislodgment resistance." Irrigants used during biomechanical preparation may affect the "push-out bond strength (POBS)" of these materials. This study assessed the effect of "2% chlorhexidine gluconate (CHX) and etidronic acid (HEBP)" on the "dislodgment resistance" of "Bio-C Repair" and "TheraCal LC." AIM: The aim of the study was to evaluate and compare the "POBS" of "Bio-C Repair and TheraCal LC" used for "furcation perforation repair" under the influence of different irrigants. MATERIALS AND METHODS: Thirty-six extracted human mandibular molars were standardized and furcal perforations were created. Teeth were assigned into two main groups based on the repair material (Bio-C Repair or TheraCal LC) and subdivided into three subgroups (n = 6) based on the irrigant used: CHX, HEBP, and distilled water. After repair and biomechanical instrumentation with specified irrigants, samples underwent POBS testing using a universal testing machine. Statistical analysis included "Fisher's t-test, analysis of variance, and Tukey's post hoc test (P < 0.05)." RESULTS: "TheraCal LC" demonstrated significantly higher bond strength than "Bio-C Repair" across all irrigants. CHX significantly reduced bond strength in "Bio-C Repair" compared to "TheraCal LC" (P < 0.001). HEBP significantly enhanced the bond strength of "Bio-C Repair" (P < 0.001). Within-group analysis showed significant differences in bond strength among "Bio-C Repair" subgroups (F = 74.22, P < 0.01) but not in "TheraCal LC" subgroups (F = 4.33, P = 0.083). CONCLUSION: "TheraCal LC" showed superior dislodgment resistance compared to "Bio-C Repair" even after exposure to various irrigants. HEBP enhanced the "bond strength" of "Bio-C Repair" and appears to be a compatible irrigant for use with calcium silicate-based repair materials. Further research is required to investigate the long-term chemical and structural effects of irrigants on these materials.