Artigo de peri??dico
Er,Cr:YSGG laser associated with acidulated phosphate fluoride gel (1.23% F) for prevention and control of dentin erosion progression
Registro en:
0268-8921
3
34
10.1007/s10103-018-2609-3
aguardando
56.351
78.50
Autor
BEZERRA, S.J.C.
TREVISAN, L.R.
VIANA, I.E.L.
LOPES, R.M.
PEREIRA, D.L.
ARANHA, A.C.C.
SCARAMUCCI, TAIS
Resumen
To evaluate the effect of Er,Cr:YSGG laser, associated with fluoride application, on the prevention/control of dentin erosion. Dentin
slabs were embedded in acrylic resin, flattened, and polished. Half of the specimens were previously eroded (10 min immersion in 1%
citric acid solution) and half were kept sound. The specimens (n = 10 each substrate) were randomly allocated into the experimental
groups, according to the following treatments: control (no treatment); APF gel (1.23% F, 1 min); Er,Cr:YSGG laser irradiation (P1:
0.25W, 20 Hz, 2.8 J/cm2, tip S75, beam diameter of 750 ??m, 1mmaway fromthe surface); Er,Cr:YSGG laser irradiation (P2: 0.50W,
20 Hz, 5.7 J/cm2, tip S75, beam diameter of 750 ??m, 1 mm away from the surface); APF gel + Er,Cr:YSGG laser P1 and; APF gel +
Er,Cr:YSGG laser P2. Afterwards, the specimens underwent an erosion-remineralization cycling, consisting of a 5-min immersion into
0.3% citric acid, followed by 60-min exposure to artificial saliva. This procedure was repeated 4??/day, for 5 days. Surface loss (SL, in
??m) was determined by optical profilometry. Specimens from each group were analyzed by environmental scanning electron microscopy
(n = 3). Data were statistically analyzed (?? = 0.05). For the eroded specimens, APF gel presented the lowest SL, being different
from the control. For the sound specimens, none of the groups differed from the control, except for Er,Cr:YSGG laser P2, which
presented the highest SL.When substrates were compared, only the eroded specimens of the control and APF + Er,Cr:YSGG laser P1
Groups showed higher SL. Selective structure removal was observed for the laser-treated groups. None of the Er,Cr:YSGG laser
parameters were effective in the prevention/control dentin erosion. The laser was also unable to enhance the protection of fluoride
against dentin erosion. Funda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (FAPESP) FAPESP: 16/25883-0