Chronic Presence of Epstein Barr Virus in Epithelial Cells From Gingiva is Associated With Periodontitis

Inclusion Criteria: * 10 patients affected by chronic periodontitis * 10 patients affected by aggressive periodontitis * 10 healthy patients (orthodontics extraction) * Subject who have read and understood the information note relative under investigation and who have signed the informed consent * major patient Exclusion Criteria: * Patient with no contre-indication to periodontal treatment * Patient with serious blood disease * Patient who exhibits systemic condition incompatible with realization of the study * Patient treated with oral retinoids, bisphosphonates, oral anticoagulants and anticonvulsivants * Patient who presents a buccal carcinoma treated with radiotherapy * Patient who have received during the past 6 months: anti-inflammatory drugs, anti-cancerous or immunosuppressive chemiotherapy * Patient who presents a linguistic or psychic incapacity to understand information