ray. at innovative dental concepts in san ramon, the doctor is using spectrum technology to get this sophisticated image of her tooth. >> there is no radiation being used in an image like this. >> the blue indicates a high level of bacteria, and red means the bacteria is already beginning to penetrate the tooth em enamel. we can talk about different techniques. >> because these pictures capture decay early, even if patients require a filling, they often only need a tiny one, which may not even require anesthesia. these pictures also motive patients to improve their habits because they can clearly see the problem zones in their mouths. >> you're look straight at your tooth going oh my goodness. okay, i do have to floss, or yeah, i need to brush more. >> reporter: the images also provide a great baseline picture for kristen so, when she comes back she'll be able to see if the changes really are making a difference in her mouth. this technology doesn't entirely replace the need for x-rays, which are still needed to catch other problems in your mouth. but it does spare patients from having the dentist