| Summary: | <p><strong>Introduction</strong>: The orthodontic treatment is a challenge in adult patients with periodontitis because of the biomechanical conditions imposed by age and the state of involvement of the periodontium, which is the main responsible for orthodontic movements.</p><p><strong>Objective</strong>: To describe the orthodontic treatment performed in an adult patient with controlled chronic periodontitis and to show the results obtained.</p><p><strong>Case</strong> <strong>Presentation</strong>: Forty-one years old female patient with chronic periodontitis. She presented diastemas and incisors extrusion, loss of periodontal insertion and exposure of the root cement, lower incisor crowding with extrusion and increase of the curve of Spee. She also had interincisive occlusal trauma. The treatment plan included the control of periodontitis, the removal of a lower incisor and the intrusion of bimaxillary incisor. The treatment lasted a year and a half. The results were excellent. The lost function was restored and periodontal insertion was increased with the consequent decrease in tooth mobility. The affected aesthetics was corrected obtaining patient satisfaction.</p><p><strong>Conclusions:</strong> From the application of the orthodontic treatment, it was possible to correct the dental position and occlusion anomalies and give the patient back the lost esthetics and a functional occlusion. Therapeutic decisions considered the state of the periodontium, the control of the disease and the age of the patient. The applied forces were extremely controlled and the treatment time was as short as possible. The motivation and care of oral hygiene contributed to the results achieved.</p>
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