Colour stability of aesthetic brackets: ceramic and plastic.
| Autor: | Filho HL; Department of Orthodontics, Federal University of Rio de Janeiro (UFRJ) Dental School, Rio de Janeiro, Brazil., Maia LH, Araújo MV, Eliast CN, Ruellas AC |
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| Jazyk: | angličtina |
| Zdroj: | Australian orthodontic journal [Aust Orthod J] 2013 May; Vol. 29 (1), pp. 13-20. |
| Abstrakt: | Background: The colour stability of aesthetic brackets may differ according to their composition, morphology and surface property, which may consequently influence their aesthetic performance. Aims: To assess the colour stability of aesthetic brackets (ceramic and plastic) after simulating aging and staining. Methods: Twelve commercially manufactured ceramic brackets and four different plastic brackets were assessed. To determine possible colour change (change of E*(ab)) and the value of the NBS (National Bureau of Standards) unit system, spectrophotometric colour measurements for CIE L*, a* and b* were taken before and after the brackets were aged and stained. Statistical analysis was undertaken using a one-way ANOVA analysis of variance and a Tukey multiple comparison test (alpha = 0.05). Results: The colour change between the various (ceramic and plastic) materials was not significant (p > 0.05), but still varied significantly (p < 0.001) between the brackets of the same composition or crystalline structure and among commercial brands. Conclusion: Colour stability cannot be confirmed simply by knowing the type of material and crystalline composition or structure. |
| Databáze: | MEDLINE |
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