Dr. Foley offers a teeth whitening procedure that has been described as the most reliable and effective bleaching system ever developed.The new KöR Whitening Deep Bleaching™ System is used by thousands of dentists worldwide in part because it is an easy process that is effective even on tetracycline-stained or dark teeth. The process begins with Dr. Foley taking impressions of a patient's teeth so that custom trays can be made.Many patients view crooked, crowded, or poorly aligned teeth as cosmetic problems, but according to Dr. Nina Foley, there are health issues – some serious – that should be considered when determining if Invisalign® or another tooth straightening dental treatment is called for.