What are some of the disadvantages of paint-on teeth whitening?
One general criticism of paint-on teeth whitening products is associated with their ability (or lack thereof) to stay put on a tooth’s surface long enough to create whitening results. Teeth whitening with peroxides is simply a case of cause and effect. To achieve tooth lightening an appropriate peroxide whitener must be in contact with the tooth’s surface for an appropriate duration of time. If these conditions are not met, the whitening effect produced will either be very minimal or take an extended number of treatments. Other types of teeth whitening systems use delivery appliances that aid in creating contact between the bleaching agent and the surface of the teeth being lightened. “Tray-based teeth whitening” refers to a technique where a bleaching gel is placed into a plastic tray that is then placed over the user’s teeth. The tray insures intimate contact between the bleaching gel and each tooth’s surface. The tray also protects the gel somewhat from being diluted or washed away
