Periodontal disease is NOT contagious. It is a multi-faceted disease that effects the life span of your teeth and gums. The initiating factors are primarily oral bacteria, which can spread from person to person. So, in that respect, periodontal disease is technically “infectious” because it takes direct contact (person to person, intimate kissing) or sharing a toothbrush. Being in the same room with someone with periodontal disease is not enough contact to contract the disease.
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