[6 classes of Burstone: typodont evaluation]. / Le sei classi di Burstone: valutazione al typodont.

ABSTRACT

The knowledge of force systems which are produced by orthodontic appliance is one of precondition for a rationale Orthodontic pretreatment. This article describes the force system developing when a straight wire is placed in two nonalligned brackets, to examine to typodont what is analysed by Burstone and Koenig in their study on six Classes.