Effect of different irrigation protocols on the radicular dentin interface and bond strength with a metacrylate-based endodontic sealer.
This study assessed the influence of different endodontic chemical substances on the adhesion of the Epiphany SE/Resilon system (with and without resinous solvent) to radicular dentin walls, using the push-out test and scanning electron microscopy (SEM). Forty-eight root canals of human canines were prepared biomechanically with ProTaper rotary files (crown-down technique) and the radicular dentin was treated with either 17% EDTA, 2% chlorhexidine gel (CHX) or 2.5% NaOCl (control). The root canals were filled with Resilon cones and Epiphany SE sealer with and without resinous solvent. Six groups of eight canals each had their roots sectioned transversally to obtain 1-mm thick slices. Data were subjected to statistical analysis by ANOVA and Tukey's tests. The specimens treated with 17% EDTA (1.59 ± 0.91) presented higher bond strength (P < 0.05) than those treated with 2.5% NaOCl (0.93 ± 0.27) and 2% CHX (0.92 ± 0.22). Significantly higher bond strength (P < 0.05) was observed when the Epiphany SE was prepared with (1.37 ± 0.78) than without (0.92 ± 0.33) solvent. Adhesive failures were predominant in all groups. SEM analysis showed greater homogeneity of the filling mass when the solvent was added to the sealer. Treatment of root canal walls with 17% EDTA, and addition of a resinous solvent to Epiphany SE produced the highest adhesion to radicular dentin.
School of Dentistry, University of Ribeirão Preto, Ribeirão Preto, São Paulo, Brazil.
Lisandro
L
Gonçalves
Yara Teresinha Correa
YT
Silva-Sousa
Walter
W
Raucci Neto
Cleonice Silveira
CS
Teixeira
Manoel Damião
MD
Sousa-Neto
Edson
E
Alfredo
D001840:Dental Bonding / Q000379:methods; D003799:Dental Stress Analysis; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000627:therapeutic use*; D006801:Humans; D008689:Methacrylates / Q000627:therapeutic use; D008855:Microscopy, Electron, Scanning; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D007507:Therapeutic Irrigation / Q000379:methods
D017220:Dentin-Bonding Agents; D008689:Methacrylates; D012387:Root Canal Filling Materials
dental-bonding agents; endodontics; root canal filling materials; scanning electron microscopy