Colour stability of aesthetic brackets: ceramic and plastic

Author:

Filho Hibernon Lopes1,Maia Lúcio Henrique1,Araújo Marcus V.1,Elias Carlos Nelson2,Ruellas Antônio Carlos O.1

Affiliation:

1. 1 Department of Orthodontics , Federal University of Rio de Janeiro (UFRJ) Dental School , Rio de Janeiro , Brazil

2. 2 Biomaterials Laboratory , Military Institute of Engineering (IME) , Rio de Janeiro , Brazil

Abstract

Abstract 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 (ΔE*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 (α = 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. (Aust Orthod J 2013; 29: 13-20)

Publisher

Walter de Gruyter GmbH

Subject

Orthodontics

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