(I) Researchers at the Washington University School of Medicine have invented a new type of technology that could revolutionize the diagnosis of gum disease (li) They have developed a thumbnail-sized chip that can detect gum disease long before your dentist can. (Ill) The automated system analyzes the patient's saliva. (IV) These antibodies attach to the proteins secreted by unhealthy cells. (V) Brightly glowing cells in the saliva indicate high levels of protein and, thus more disease.