Sv. Barbosa et al., INFLUENCE OF SODIUM-HYPOCHLORITE ON THE PERMEABILITY AND STRUCTURE OFCERVICAL HUMAN DENTIN, International endodontic journal, 27(6), 1994, pp. 309-312
The effect of 5% sodium hypochlorite and 35% hydrogen peroxide on dent
ine samples in vitro was investigated. It was demonstrated that both 5
% NaOCl and 35% H2O2 depletes the dentine, which can be recorded as we
ight loss. Sodium hypochlorite removes approximately 14% of dry weight
from dentine samples in 24 h; hydrogen peroxide is half as destructiv
e. The hydraulic conductance (L(p)) of dentine after treatment with Na
OCl is increased over 100%. It is suggested that the use of high conce
ntrations of sodium hypochlorite during root canal treatment may negat
ively affect the integrity of the root canal wall thereby allowing inc
reased access of caustic bleaching fluids to cervical vital tissues.