[Excellence in orthodontics. Interview by M. G. Choukroun and O. Sorel]

"Excellence is not an act, it is a daily exercise", is a sentence quoted by B. Zachrisson and is the cornerstone of his approach. He explains how, by a careful inspection and an analysis of the facial bone structure, using the patient's movement, he can establish a diagnosis and set the treatment's objectives. He defines the key points of a balanced smile, the rules and guidelines for enamel reproximation, the methods of bonding and the rules governing the stability of orthodontic treatments.