Ultradex interdental tape slides comfortably between teeth to effectively remove plaque and deris above and below the gum line plaque and tartar causing bacteria can be found in the smallest and most difficult to reach areas of your mouth these areas cannot be reached alone by brushing in addition the anti bacterial agent has been shown to kill bacteria that can cause gum problems tooth decay and plaque and to also whiten teeth bacteria cannot become resistant to ultradex and regrowth