Effect of Pre-endodontic Sealing on the Microleakage of Temporary Restorative Materials After Endodontic Treatment: An In Vitro Study

Objective: This study aimed to investigate the effectiveness of various commercial temporary restorative materials in preventing microleakage when used in conjunction with a pre-endodontic sealing technique (PES). Methods: Ninety-six human single-rooted premolars were prepared for endodontic access and randomly allocated to five groups according to the material to restore the cavity (n=16): CON: Control group, Tetric N-bulk, Ivoclar; COL: Coltosol, Coltene; KET: Ketac Molar, 3M; FUJ: Gold Label Fuji II, GC; CLI: Clip F; and two experimental conditions (n=8): COT: conventional technique and PES technique. Methylene blue dye penetration was measured in mm. Two-way ANOVA and Bonferroni post-hoc were used (p<0.05). Results: For most materials, PES exhibited statistically significantly lower values of dye penetration (p<0.001), except for KET and COL. The highest dye penetration was found in FUJ using the COT technique. Conclusion: The PES technique was more effective in preventing microleakage when polymer-based materials were used.