5 Medical Facts that Every Dentist Simply MUST Know. . . There is a well-substantiated link between oral health and certain systemic diseases.1 Diseases can lower the body’s resistance to infection, making it more susceptible to developing or exacerbating periodontal disease. Pregnant women with periodontal disease tend to have earlier term babies and babies of lower birth weight.2 Rheumatoid arthritis, Sjogren’s Syndrome and even Alzheimer’s can affect oral health.3 Recent ...