Normal 0 false false false EN-US X-NONE AR-SA One of the concerns od patients have been teeth stains particularly in anterior region. The etiology of this can be pulp necrosis, developmental disorders, drugs and systemic diseases. Bleaching or tooth whitening is a solution for some of these color changes. This article evaluated different methods of bleaching and their side effects . In case in which tooth whitening is needed, attentive case selection should be done and advantages and disadvantages of each method should be considered in order to apply the best treatment among other options of bounding, veneering or crowning.
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