How effective are paint-on teeth whiteners as compared to other at-home teeth whitening products?
We were unable to find any reference to any dental study that directly compared the relative effectiveness of the four primary types of at-home teeth whitening systems (tray-based teeth whitening using a carbamide peroxide bleaching gel, whitening strips, paint-on teeth whiteners, and teeth whitening toothpaste). In fact, most of the literature we found regarding paint-on teeth whiteners only compared their use to no treatment, other paint-on products, or else teeth whitening toothpastes. This seemed to suggest to us that many studies were purposely designed so a direct comparison between paint-on teeth whitening technique and other at-home bleaching systems known to be effective was avoided.
