Color stability of ceramic brackets immersed in potentially staining solutions

Abstract

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.

Can the chlorhexidine gluconate solution potentiate the staining of polycrystalline ceramic brackets?

“…In the present study, the polycrystalline ceramic brackets were subjected to treatments with chlorhexidine associated or not with dye substances, which were previously used in studies on staining 9,10 .…”

“…The spectrophotometer measures a wavelength by time from the reflective property or object transfer 22 . This study assessed the samples immersed in staining solution for three minutes under agitation, once a day for five days of the week, during 28 days, according to the protocol used by Godoi et al 16 Several hypotheses were investigated for the mechanisms associated with staining.…”

“…The sample size considered the previous literature 9,13 , significance level of 0.05, and test power of 0.80. Therefore, the final sample included 72 polycrystalline ceramic brackets (Iceram, Orthometric, Marília, São Paulo, Brazil; Batch 037268001) of upper right central incisors, which were divided into six groups (n=12) according to dye solution: G1 -distilled water (control group, Asfer, Indústria Química, São Caetano do Sul, SP, Brazil; Batch 274); G2 -0.12% chlorhexidine (Periogard, Colgate; Batch 7125BR121A); G3 -instant coffee (Nescafé, Nestlé, São Paulo, Brazil; Batch 80301210); G4 -red wine (Reservado, Carbenet Sauvignon 12.5% alcohol volume, Concha y Toro/ Santiago do Chile; Batch: 1110716); G5 -chlorhexidine and coffee; G6 -chlorhexidine and wine, as Figure 1 shows.…”

“…The ceramic brackets, although desired by patients, still deteriorate in the oral cavity and present some limitations when exposed to certain substances such as coffee, black tea, and red wine, causing color change and consequently the loss of the esthetic standard desired [8][9][10] . This impregnation of food and beverage pigments is considered one of the main extrinsic staining factors of such devices 11 .…”

In Vitro Effect of Alcohol and Non-Alcohol Based Mouth Rinses on Color Stability of CAD/CAM Resin Ceramic and Feldspathic Ceramics

“…The color of tooth colored restorative materials may be influenced by plaque accumulation, stains from solutions, surface roughness, and chemical degradation, as a result of exposure and consumption of different beverages, food or the use of mouth rinses (1,2) . Prevention of dental caries and/or gingivitis is basically maintained by routine and proper oral hygiene.…”