Purpose: The aim of this study was to analyse the effects, risks and benefits of orthodontic treatment with fixed appliances using the straight arch technique in periodontal patients. Periodontal treatment as a single therapy is not always able to correct and control the damage produced by periodontal disease. In these cases, orthodontic tooth movement is an important step when planning the global treatment of the patient. Recovering the integrity and continuity of the dental arch, as well as balanced tooth positioning, is an essential step for the successful treatment of a patient with periodontitis and pathological migration of teeth. Patients with periodontitis often have several orthodontic clinical peculiarities, such as inadequate angulation, excessive buccal protrusion, extrusion of one or more incisors, diastemas and tremas, with progressive spacing of incisors.