Model to assess duration of distraction compared with degree of incisal crowding in symphyseal distraction osteogenesis.

Our aim was to evaluate symphyseal distraction in relation to duration of expansion, and to propose an optimised procedure. Eighteen patients (mean (SD) age 19 (7) years) with transverse mandibular deficiency were treated by symphyseal distraction osteogenesis. The mean (SD) anterior dental crowding measured was 6.

[Deformities and therapeutic attitudes].

Because dental dysmorphias make up a large part of the problems we deal with in our daily practices, it is important that we classify them according to their severity. Accordingly, we should define the relevant concepts of norm, anomaly, dysmorphia, and malformation. Over the years these notions have been viewed in a great variety of ways depending on the epoch and the particular society.