Color stability of ceramic brackets immersed in potentially staining solutions.
OBJECTIVE
To assess the color stability of five types of ceramic brackets after immersion in potentially staining solutions.


METHODS
Ninety brackets were divided into 5 groups (n = 18) according to brackets commercial brands and the solutions in which they were immersed (coffee, red wine, coke and artificial saliva). The brackets assessed were Transcend (3M/Unitek, Monrovia, CA, USA), Radiance (American Orthodontics, Sheboygan, WI, USA), Mystique (GAC International Inc., Bohemia, NY, USA) and Luxi II (Rocky Mountain Orthodontics, Denver, CO, USA). Chromatic changes were analyzed with the aid of a reflectance spectrophotometer and by visual inspection at five specific time intervals. Assessment periods were as received from the manufacturer (T0), 24 hours (T1), 72 hours (T2), as well as 7 days (T3) and 14 days (T4) of immersion in the aforementioned solutions. Results were submitted to statistical analysis with ANOVA and Bonferroni correction, as well as to a multivariate profile analysis for independent and paired samples with significance level set at 5%.


RESULTS
The duration of the immersion period influenced color alteration of all tested brackets, even though these changes could not always be visually observed. Different behaviors were observed for each immersion solution; however, brackets immersed in one solution progressed similarly despite minor variations.


CONCLUSIONS
Staining became more intense over time and all brackets underwent color alterations when immersed in the aforementioned solutions.
Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte, Minas Gerais, BR.
Bruna Coser
BC
Guignone
Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte, Minas Gerais, BR.
Ludimila Karsbergen
LK
Silva
Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte, Minas Gerais, BR.
Rodrigo Villamarim
RV
Soares
Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte, Minas Gerais, BR.
Emilio
E
Akaki
Universidade Estadual Paulista Júlio de Mesquita Filho, Araçatuba, São Paulo, BR.
Marcelo Coelho
MC
Goiato
Universidade Estadual do Sudoeste da Bahia, Jequié, Bahia, BR.
Matheus Melo
MM
Pithon
Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte, Minas Gerais, BR.
Dauro Douglas
DD
Oliveira
D000537:Aluminum Oxide / Q000737:chemistry; D002253:Carbonated Beverages; D002516:Ceramics / Q000737:chemistry*; D003069:Coffee; D003116:Color; D004396:Coloring Agents / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry*; D007101:Immersion; D008422:Materials Testing; D016910:Orthodontic Brackets; D012464:Saliva, Artificial / Q000737:chemistry; D013053:Spectrophotometry / Q000295:instrumentation; D013499:Surface Properties; D013997:Time Factors; D014920:Wine
D003069:Coffee; D004396:Coloring Agents; D003764:Dental Materials; D012464:Saliva, Artificial; D000537:Aluminum Oxide