Long-term sealing ability of resin-based root canal fillings.
OBJECTIVE
To evaluate the ability of two resin-based filling materials to provide immediate and long-term sealing of the root canal.


METHODS
A total of eighty-two human roots were instrumented and filled with AH Plus/gutta-percha or Epiphany/Resilon. Root filled teeth were sealed coronally either with Coltosol or Clearfil SE Bond/Filtek Z250 or were left unsealed. The quality of root canal sealing was assessed by a fluid filtration method performed at immediate and 180-day time intervals. Mean fluid filtration rates were analyzed by three-way repeated measures anova and Tukey post hoc test.


RESULTS
Specimens filled with Epiphany/Resilon exhibited higher leakage than specimens filled with AH Plus/gutta-percha (P < 0.05), regardless of the coronal sealing condition and period of evaluation. No difference was detected between coronal restorative materials (P > 0.05), whilst leakage in teeth without any coronal restoration was significantly higher (P < 0.05). After storage, a significant decrease in leakage (P < 0.05) was observed in all experimental groups.


CONCLUSIONS
AH Plus/gutta-percha provided superior root canal sealing at both immediate and 180-day time periods. The presence of a coronal seal reduced leakage significantly. Storage of root filled specimens did not disturb the sealing ability of the tested materials.
Department of Restorative Dentistry, Endodontic Area, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil.
J
J
Santos
L
L
Tjäderhane
C
C
Ferraz
A
A
Zaia
M
M
Alves
M
M
De Goes
M
M
Carrilho
D003763:Dental Leakage / Q000517:prevention & control*; D018772:Dental Marginal Adaptation; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods; D003804:Dentin; D017220:Dentin-Bonding Agents / Q000737:chemistry / Q000627:therapeutic use; D004853:Epoxy Resins / Q000737:chemistry* / Q000627:therapeutic use; D006171:Gutta-Percha / Q000627:therapeutic use; D006801:Humans; D012387:Root Canal Filling Materials / Q000737:chemistry* / Q000627:therapeutic use; D013997:Time Factors
D017220:Dentin-Bonding Agents; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; C486893:epiphany sealer; C534916:epoxy resin-based root canal sealer; C486892:resilon sealer; D006171:Gutta-Percha