| dc.description | Considering the aging of the
population, the greater exposure
of the root surfaces and the higher
caries risk in these surfaces,
the development of strategies
that efficiently remineralize root
caries lesions in a long-lasting
way is strictly necessary. This
in vitro blind randomized study
evaluated the potential of remineralization
of root caries lesions
promoted by Er,Cr:YSGG laser
irradiation (2.78 ??m) associated
with a bioactive glass (Biosilicate
??). 60 bovine root dentin
slabs with incipient caries lesions
were distributed in 6 experimental
groups {n:::15l, in order to be treated
with laser irradiation (0.25W,
12.5 mJ/pulse, 2.8 J/cm2, 20 Hz,
without refrigeration), application
of Biosilicate?? or association
of both. After the treatments,
the samples were subjected to
an 8-day pH-cycling regimen,
and further evaluated by Fourier
transformed infrared spectroscopy
{FTIR), optical coherence
tomography (OCT) and scanning
electron microscopy. The data
were statistically analyzed at a 5% significance level. The Biosiljcate
?? promoted the formation of
carbonated hydroxyapatite even
before loser irradiation, which
was better retained after demineralization
in loser irradiated
group. The Biosilicote?? and the
la ser irradiation alone provided
the remineralization of the root
dentin in a similar way to that
promoted by the topical application
of acidulated phosphate
fluoride, since all groups had
comparable optical attenuation
coefficients. The association of
the Biosilicate?? with the loser
irradiation showed higher optical
attenuation coefficient than the
other experimental groups. It
was concluded that the association
of Biosilicote?? with laser
irradiation promoted a synergistic effect, augmenting the
remineralization of root dentin
and preventing the progression
of caries. | |
