Artigo
In situ assessment of the saliva effect on enamel morphology after microabrasion technique
Registro en:
Brazilian Journal of Oral Sciences. Faculdade de Odontologia de Piracicaba - UNICAMP, v. 13, n. 3, p. 187-192, 2014.
1677-3225
10.1590/1677-3225v13n3a05
S1677-32252014000300187
S1677-32252014000300187.pdf
9693348671473011
Autor
Pini, Núbia Inocencya Pavesi
Lima, Débora Alves Nunes Leite
Sundfeld, Renato Herman [UNESP]
Ambrosano, Gláucia Maria Bovi
Aguiar, Flávio Henrique Baggio
Lovadino, José Roberto
Resumen
AIM:This study evaluated saliva effects on enamel morphology surface after microabrasion technique.METHODS:Enamel blocks (16 mm2) obtained from bovine incisors were divided into 9 groups as follows: one control group (no treatment), four groups with microabrasion treatment using 35% phosphoric acid and pumice (H3PO4+Pum) and other four groups treated with 6.6% hydrochloric acid and silica (HCl+Sil). One group of each treatment was submitted to 4 frames of saliva exposure: without exposure, 1-h exposure, 24-h exposure, and 7-days exposure on in situ regimen. Nineteen volunteers (n=19), considered as statistical blocks, used an intraoral appliance containing the specimens, for 7 days. Enamel roughness (Ra) was tested before and after treatment, and after saliva exposure. Confocal laser scanning microscopy (CLSM) was used to evaluate qualitatively the enamel morphology.RESULTS:All groups exhibited increased Ra after microabrasion. With regards to saliva exposure, the treatment with HCl+Sil presented more susceptibility to the saliva action, but no period of time was efficient in re-establishing this characteristic compared with the control group. CLSM analysis showed reduction of the micro-abrasive damages during the experimental times.CONCLUSIONS:Seven days of saliva exposure were not sufficient for the treated enamel to reach its normal characteristics compared with the control group. Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Universidade Estadual de Campinas Piracicaba Dental School Department of Restorative Dentistry Universidade Estadual Paulista Araçatuba Dental School Department of Restorative Dentistry Universidade Estadual de Campinas Piracicaba Dental School Department of Social Dentistry Universidade Estadual Paulista Araçatuba Dental School Department of Restorative Dentistry