| Autor: |
PINI, NÚBIA I. P., COSTA, RAFAELA, BERTOLDO, CARLOS E. S., AGUIAR, FLAVIO H. B., LOVADINO, JOSÉ R., NUNES LEITE LIMA, DÉBORA ALVES |
| Zdroj: |
Contemporary Clinical Dentistry; Apr-Jun2015, Vol. 6 Issue 2, p170-175, 6p |
| Abstrakt: |
Background: Enamel micro abrasion is an esthetic treatment for removing superficial stains or defects of enamel. Aim: This study evaluated the roughness after enamel micro abrasion using experimental micro abrasive systems. Materials and Methods: One hundred and ten samples (5 × 5 mm) were obtained from bovine incisors and divided into 11 groups (n = 10) in accordance with the treatment: Micro abrasion using 6.6% hydrochloric acid (HC) or 35% phosphoric acid (H3PO4) associated with aluminum oxide (Al3) or pumice (Puma) with active application (using rubber cup coupled with a micro-motor of low rotation) or passive application (just placing the mixture on the enamel surface); just the use of acids in a passive application (negative control), and a group without treatment (positive control). Roughness analysis was performed before and after treatments. The statistical analysis used analysis of variance (PROC MIXED), Turkey-Kramer and Dunne tests (P < 0.05). Representative specimens were evaluated using scanning electron microscopy (ESEM). Results: There was no significant difference between the acids used (P = 0.0510) and the applications (P = 0.8989). All of the treated groups were statistically different from the positive control. When using passive application, the use of HC + Al3 resulted in higher roughness when compared with HC + Puma. Additionally, this treatment was statistically different from the passive application of H3PO4 (negative control) (P < 0.05). However, ESEM analysis showed that the treatment with Al3 resulted in an enamel surface with a more polished aspect when compared with Puma. Conclusion: Al3 may be a suitable particle for use in micro abrasive systems. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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