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Effects of fixed orthodontic treatment using conventional (two-piece) versus metal injection moulding brackets on hair nickel and chromium levels: a double-blind randomized clinical trial.

CONCLUSION: Hair nickel and chromium levels might increase about 185-200% after 6 months. They might not be affected by bracket types. Gender and age might not influence the baseline or 6th-month levels of both metals. Gender might however interact with orthodontic treatment, only in the case of chromium. REGISTRATION: The research is registered offline (thesis) and online (IR.AJUMS.REC.1394.516). PROTOCOL: The protocol was pre-determined before any experiments begin. FUNDING: The study was self-funded by the authors. PMID: 26969422 [PubMed – as supplied by publisher] (Source: European Journal of Orthodontics)

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