Effects of Antibiotic Therapy on the Short and Long-term Results of Periodontitis Treatments

Inclusion criteria: * Patient over 18 years old * Patient treated for periodontitis between 01/01/2012 and 07/31/2021 * Patient whose medical and periodontal file contains all the elements necessary for data analysis * Subject not having expressed, after information, his opposition to the reuse of his medical data for the purposes of this research. Exclusion criteria: * Patient who expressed his opposition to participating in the study * Patient without periodontitis * Patient smoking more than 10 cigarettes / day * Patient presenting a dilapidated oral state (untreated caries, unrestored teeth), oral infectious foci whose management requires antibiotic treatment during the initial treatment * Impossibility of giving the subject informed information * Subject under safeguard of justice * Subject under guardianship or guardianship