You can take years off your smile, using KORS unique whitening system. Remove discoloration caused by age, food, drinks and smoking, and control how white your teeth become. Developed by an American dentist, Dr. Rod Kurthy in California, it is the only teeth whitening product that relies entirely on refrigeration to keep the whitening gels fresh and active and reduces sensitivity. It works well for a whole range of cases, from average discoloration to more extreme tetracycline cases. Clinical Research Associates (CRA) as well as other researchers have found that whitening gel in conventional whitening trays is only strongly active for 25-30 minutes. This is due to rapid contamination of the whitening gel by saliva. KOR whitening trays are designed to seal fluid out of the trays. It delivers beautiful, natural-looking results. How white do you want your teeth to look? It’s all up to you. Speak to your dentist about refreshing your look with the KORS Whitening System and smile as big as you’d like.