出版社:THE SCHOOL OF PUBLIC HEALTH, TEHRAN UNIVERSITY OF MEDICAL SCIENCES
摘要:Dear Editor-in-Chief Demands for orthodontic treatment have been an increased trend and, at the same time, orthodontists try to obviate patients’ esthetics and dynamic problems. In orthodontics, most of the patients are children and adolescents, and the orthodontic treatment usually extends over a period of 2-3 years or even longer, thereby implying supplementary costs.