Nickel-free vs conventional braces for patients allergic to nickel: Gingival and blood parameters during and after treatment
| Autor: | Saul Martins Paiva, Tarcília Aparecida Silva, Leandro Silva Marques, Luciano José Pereira, Camila Alessandra Pazzini, Joana Ramos-Jorge |
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| Rok vydání: | 2016 |
| Předmět: |
Adult
Male medicine.medical_specialty Allergy Adolescent Orthodontic Brackets Gingiva chemistry.chemical_element Orthodontics Immunoglobulin E Gastroenterology Leukocyte Count Young Adult 030207 dermatology & venereal diseases 03 medical and health sciences 0302 clinical medicine Nickel Internal medicine Hypersensitivity Humans Medicine Child biology medicine.diagnostic_test business.industry Repeated measures design Patch test Complete blood count 030206 dentistry Middle Aged medicine.disease Basophils Surgery Eosinophils chemistry biology.protein Female Nickel free Periodontal Index business Blood parameters |
| Zdroj: | American Journal of Orthodontics and Dentofacial Orthopedics. 150:1014-1019 |
| ISSN: | 0889-5406 |
| DOI: | 10.1016/j.ajodo.2016.05.009 |
| Popis: | Introduction Allergic and inflammatory reactions have commonly been associated with the release of metal ions during orthodontic treatment. Our objective was to evaluate prospectively gingival and blood status in patients allergic to nickel. Methods Allergy to nickel was diagnosed using a patch test. Two groups were established: conventional braces (n = 21) and nickel-free braces (n = 21). The gingival index was used to determine gingival status before treatment, periodically for 12 months (evaluations every 3 months), and 1 month after the removal of the braces. Blood status was evaluated with a complete blood count, including the quantification of nickel and immunoglobin E before treatment, during treatment, and 1 month after removal of the braces. The data were analyzed using Mann-Whitney, Student t, Wilcoxon, repeated measures analysis of variance, Friedman, and chi-square tests. Either the Pearson or the Spearman correlation coefficients were calculated, when appropriate. Results The number of basophils increased significantly among the evaluations in both groups (conventional, P = 0.002; nickel-free, P = 0.001), whereas the number of eosinophils and the immunoglobin E levels decreased significantly in the conventional group (P = 0.004). Plasma nickel levels were increased before and during treatment, and decreased 1 month after removing the braces in both groups, but the differences were significant only in the nickel-free group (P = 0.002). No correlations were found between the concentrations of nickel and immunoglobin E, basophils, or eosinophils, or between the gingival index and either bands or segmented neutrophils (P ≥ 0.05). Conclusions Patients treated with nickel-free braces had better gingival health and smaller blood changes than did those treated with conventional braces. All abnormalities tended to be eliminated after the removal of the braces. |
| Databáze: | OpenAIRE |
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