Cosmetic teeth whitening is a great way to improve your appearance and boost your self-confidence. Blanc. a smile spa, we take pride in enhancing people's smiles. We achieve visible whiter results with FDA-registered products that are made in the U.S.A. Before you book an appointment, please review the following: People with known allergies to bleaching agents or hydrogen peroxide are not eligible for teeth whitening. Before booking an appointment, patients with severe periodontal disease and irritation should consult their dentist. Any current restorations such as veneers, crowns, or porcelain fillings can't be whitened. They may look different to your natural teeth.