The aim of this study was to investigate four root canal sealers-Pulp
Canal Sealer EWT, Sealapex, AH26, and Ketac-Endo-for their antibacteri
al effects within dentinal tubules, Sterile saline served as a control
, Sixty-six standardized bovine root specimens were infected with Ente
rococcus faecalis following smear layer removal, The materials were pl
aced in the lumina, and six specimens from each group were stored for
24 h (48 h for AH26) and 7 days, after which dentin samples were taken
from within the lumina using ISO 023 to 035 burs, Powder samples were
incubated and the quantity of bacteria present assessed using spectro
photometry, All sealers showed antibacterial activity at 24 h, except
Ketac-Endo, The activity of Pulp Canal Sealer EWT was similar at 24 h
and 7 days, Sealapex had greater antibacterial effect at 7 days than i
t did at 24 h, The strongest effects were demonstrated by AH26.