N. P. Sahoo

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INTRODUCTION Our objective was to evaluate and compare the salivary levels of nickel and chromium before and 1, 7, and 30 days after placement of conventional and self-ligating appliance systems. METHODS Twenty women were randomly divided into 2 groups. Patients in group 1 had conventional brackets bonded to their teeth; in group 2, self-ligating brackets(More)
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