Pathologic tooth migration (PTM) is a common complication of moderate-to-severe periodontitis.1,2 The prevalence of PTM among periodontal patients has been reported to range from 30.03% to 55.8%. It occurs most frequently in the anterior region, but posterior teeth can also be affected. There are many types of pathologic tooth migration: diastema, extrusion, rotation, facial flaring, and drifting into edentulous spaces. Some of the important factors are poor periodontal support as the result of periodontal disease and the eventual loss of teeth, which changes the forces exerted on the remaining dentition. Later, if the missing teeth are not replaced, especially the first molars, the maxillary incisors are forced labially and laterally, which leads to the extrusion of the anterior teeth and the resulting diastema. Teeth mobility increases, and the second and third molars tilt mesially, which results in a reduced vertical dimension. This can also lead to an anterior overbite, and the mandibular incisors occlude near or on the palatal gingival margin of the maxillary anterior dentition.

PTM is caused by several factors, and one or more teeth can be involved. The treatment of most cases may require a multidisciplinary approach. In addition to periodontal therapy, orthodontic tooth movement can be beneficial. Replacing missing teeth with implants can stabilize the occlusion and reduce the trauma on the anterior dentition