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How does conventional whitening toothpaste work?

The primary stain removal ingredient in conventional whitening tooth paste is either silica abrasive agent or bleaching agents like hydrogen peroxide or carbamide peroxide. Studies have shown that these abrasive/bleaching agents can cause some amount of tooth wear that result in tooth sensitivity. Continuous application or excessive use of bleaching agents also results in sore gums, which relieves only after discontinuation of the bleaching agent.

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