Abstract
In chemo-mechanical caries removal procedures,
chloramines are typically used for chemical
softening of carious dentin. However, the specific
effect of chloramines to be compared to sodium
hypochlorite has not been sufficiently clarified. In
present study, the effect of chloramines used in the
Carisolv-system on carious dentin mechanical
properties and morphology were investigated,
using Vickers hardness test and scanning electron
microscopy (SEM).
Sections of permanent teeth with dentin caries
were treated with chloramines, prepared by mixing
amino acids (glutamic acid, lysine, and leucine)
with sodium hypochlorite or with sodium
hypochlorite alone or with purified water. There
was a tendency that the application of the sodium
hypochlorite solution softened the sound dentin
and/or inner layer of carious dentin more than the
application of the chloramines solution did. In
SEM observations, the application of chloramines
resulted in opening dentinal tubules in the outer
layer of carious dentin: Occluded dentinal tubules
were seen after sodium hypochlorite application.
There is a possibility that the amino acids in the
Carisolv-system decrease the aggressive effect of
sodium hypochlorite on sound dentin and/or
inner layer of carious dentin and also would
enhance the disrupting effect on degenerated collagen
in carious dentin outer layer.
