Our “tray alone” teeth whitening system from Opalescence® would work for light sensitive people or melanoma patients. These systems also work well to lighten a few teeth next to existing porcelain crowns. Safe, effective and convenient – The Opalescence® Tooth Whitening System has been proven safe in many clinical studies over the past ten years. Opalescence 10% also holds the American Dental Association’s Seal of Approval.