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Dental Research Journal، جلد ۱۵، شماره ۳، صفحات ۰-۰
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عنوان انگلیسی Porcelain color alteration after orthodontic bonding using three different surface preparation methods
چکیده انگلیسی مقاله Background: By increasing the number of adults seeking orthodontic treatment bonding orthodontic brackets to the surfaces other than intact enamel has become necessary. The purpose of this study was to evaluate the effect of three different surface preparation methods associated with orthodontic bonding on porcelain color alteration. Materials and Methods: In this in vitro study forty‑five porcelain discs (6‑ mm diameter, 2‑ mm thickness) were fabricated. The color of the specimens was evaluated by means of a Vita Easyshade. Commision Internationale de I'Eclairage (CIE) L* a* b* system was used for color measurement. Then, the specimens were randomly divided into three groups (n = 15) with respect to the surface preparation methods including a 9.6% hydrofluoric acid (HF) + silane, sandblasting, and sandblasting + 9.6% HF + silane. Metal orthodontic brackets were bonded. Samples were stored in 37° c water for 24 hours. Afterward, the brackets were debonded with a debonding plier and porcelain surfaces were polished with a tungsten‑carbide bur. The color assessment was done, and ΔE values were measured. ΔE = 3.7 units were considered as an acceptability threshold. Data were analyzed with Paired t‑test and one‑way ANOVA. Level of significance was set at P < 0.05. Results: Orthodontic bonding changed the color parameters significantly. Mean L*, a* and b* difference were 1.35 ± 2.41, 0.19 ± 0.80, 0.89 ± 1.27 units, respectively (P = 0.003 for L*, P < 0.001 for a* and b*). There was not any significant difference in ΔE units between the groups (P = 0.456). In all the groups the mean ΔE values were below 3.7 units and within the clinically acceptable limit. Conclusion: Orthodontic treatment changed the CIE color parameters of porcelain surface. However, the color alteration is below the clinically acceptable threshold. With regard to color alteration, there is no difference between different surface conditioning methods. Key Words: Dental bonding, dental debonding, dental porcelain, orthodontic brackets
کلیدواژه‌های انگلیسی مقاله
نویسندگان مقاله | Mehrnaz Moradinezhad


| Mina Moradi


| Milad Shamohammadi


| Elham Hormozi


| Amir Ghorani


نشانی اینترنتی http://drj.mui.ac.ir/index.php/drj/article/view/1950
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/171/article-171-1956093.pdf
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Original Article(s)
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