Misc: Helps prevent tartar & whitens teeth. www.crest.com. Crest recommends Oral-B toothbrushes. For healthy teeth, brush twice a day, floss daily and visit your dentist regularly. Fights tartar and whitens teeth. Special tartar blocker provides effective tartar protection. Once formed, tartar can only be removed by dental cleaning. And whitens teeth: With cleaning action that gently removes surface stains and helps prevent yellow tartar build-up.