Dr. Prabhu, the principal dentist at oro care. Comes with a wealth of experience in hospital, community and general dentistry. The process generally takes about 1 hour. First, the dental specialist will do a general cleaning and polishing then a protective layer will be carefully painted on the gums and papilla (the tips of the gums between the teeth). Then the bleaching gel is applied gently on the teeth surface from pre-molar to pre-molar.