This case report describes the multidisciplinary orthodontic treatment of an adult female with a skeletal Class III malocclusion, extensive root absorption in the incisors, and a mesially impacted and excessively rotated canine, treated using clear aligners without application of temporary anchorage devices.

Although the extraordinary complex malocclusions and vulnerable periodontal status pose great challenges to orthodontists, orthodontic treatment combined with periodontal therapy is essential for patients with severe periodontitis and pathologic tooth migration. This case report describes the multidisciplinary orthodontic treatment of an adult with severe periodontitis.