A whiter, brighter smile is beautiful – it can help you feel better about yourself and make a memorable impression Many things we do on a regular basis can contribute to stained teeth, such as drinking coffee, tea, cola and red wine or smoking. With our GLO whitening system the patient may expect 6-8 shade shift. Is necessary just three fifteen minute sessions for a total treatment time 1 – 1 ½ hour. A previous teeth cleaning is necessary.