West richland professional dental whitening. Cosmetic Dentist in Tricities Wa. There are several ways to whiten your smile. This patient had tried whitening before using over the counter products but was only left with severe tooth sensitivity and questionable results. After a dental examination doctor Cantu recommended KOR Whitening which is a high strength professional whitening product that whitens even the most difficult cases. This patient had customized molds taken for the fabrication of whitening trays, of which she took home for two weeks to prepare her teeth for the in-office appointment gels. The pictures above show the results after two weeks of at home whitening and a single visit whitening at the office.