Efficacy of two contemporary single-cone filling techniques in preventing bacterial leakage.
This in vitro study evaluated the sealing efficacy of three root-filling systems/techniques in preventing bacterial leakage. Instrumented single-rooted root segments were filled with (1) warm vertical compaction with gutta-percha/AH Plus; (2) single-cone technique with ActiV GP; and (3) single-cone technique with Gutta-Flow. A dual-chamber leakage model using S. mutans as a microbial marker was used for leakage evaluation. Bacterial penetration was monitored over a 100-day period. Leakage was recorded when turbidity was observed in the lower chamber. Gutta-percha warm vertical compaction exhibited the best seal with bacterial leakage observed in only 16.7% of the specimens between 59 and 100 days. All ActiV GP specimens leaked between 7 and 100 days; 50% of the Gutta-Flow specimens leaked between 22 and 100 days. The two contemporary single-cone techniques did not insure a durable apical seal against bacterial leakage. A warm vertical compaction technique using thermoplasticized gutta-percha and AH Plus sealer appears to be more effective in minimizing bacterial leakage.
Monticelli
Francesca
F
Department of Restorative Dentistry and Dental Materials, University of Siena, Siena, Italy.
Sadek
Fernanda T
FT
Schuster
George S
GS
Volkmann
Keith R
KR
Looney
Stephen W
SW
Ferrari
Marco
M
Toledano
Manuel
M
Pashley
David H
DH
Tay
Franklin R
FR
D003763:Dental Leakage / Q000517:prevention & control*; D004129:Dimethylpolysiloxanes; D004338:Drug Combinations; D004853:Epoxy Resins; D005899:Glass Ionomer Cements; D006171:Gutta-Percha; D006801:Humans; D053208:Kaplan-Meier Estimate; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000379:methods*; D013295:Streptococcus mutans
D004129:Dimethylpolysiloxanes; D004338:Drug Combinations; D004853:Epoxy Resins; D005899:Glass Ionomer Cements; C515718:GuttaFlow; D012387:Root Canal Filling Materials; C534916:epoxy resin-based root canal sealer; D006171:Gutta-Percha