Effect of sodium fluoride and stannous chloride associated with Nd:YAG laser irradiation on the progression of enamel erosion

Joao-Souza, Samira Helena; Cardoso Bezerra, Savio Jose; Borges, Alessandra Buehler [UNESP]; Aranha, Ana Cecilia; Scaramucci, Tais

Effect of sodium fluoride and stannous chloride associated with Nd:YAG laser irradiation on the progression of enamel erosion

Arquivos

WOS000365877200001.pdf (308.81 KB)

Data

2015-12-01

Autores

Joao-Souza, Samira Helena

Cardoso Bezerra, Savio Jose

Borges, Alessandra Buehler

Aranha, Ana Cecilia

Scaramucci, Tais

Editor

Springer

Tipo

Artigo

Direito de acesso

Acesso aberto

Resumo

This study evaluated the progression of enamel erosion after treatment with gels containing sodium fluoride (NaF; 9047 ppm F) and stannous chloride (SnCl2; 3000 ppm Sn), associated or not with Nd:YAG laser irradiation. Sixty enamel specimens were prepared from bovine incisors and protected by a tape, leaving an exposed surface area of 4 x 1 mm. The specimens were immersed in 1 % citric acid (pH = 2.3) for 10 min to create an initial erosion lesion. After, they were randomly divided into six groups: (C) control: gel without active ingredient; (F): NaF gel; (F + Sn): NaF + SnCl2 gel; (laser): Nd:YAG laser irradiation (0.5 W; 50 mJ; similar to 41.66 J/cm(2); 10 Hz; 40 s); (F + laser): NaF gel + Nd:YAG; (F + Sn + laser): NaF + SnCl2 gel + Nd:YAG. All gels had pH = 4.5 and were applied for 1 min. Laser irradiation was performed after gel application. The specimens were then submitted to a 5-day erosion-remineralization cycling model using 1 % citric acid (pH = 2.3), six times per day. Enamel surface loss (SL) was analyzed by optical profilometry in the end of the cycling (in mu m). Data were analyzed by one-way ANOVA and Holm-Sidak tests (alpha = 0.05). The control and the laser groups presented the highest enamel loss (means +/- SD = 53.52 +/- 3.65 and 53.30 +/- 2.73, respectively), followed by F + Sn (44.76 +/- 2.83). The groups F (36.76 +/- 2.28), F + laser (36.25 +/- 3.59), and F + Sn + laser (39.83 +/- 4.62) showed the lowest enamel loss, with no significant difference among them (p > 0.05). In conclusion, NaF by itself or associated with SnCl2 and Nd:YAG laser was able to reduce enamel erosion progression. Nd:YAG laser alone did not show a protective effect.