[The accuracy of soft tissue profile prediction with the "Dentofacial Planner" in skeletal prognathism]

30 pre- and postoperative lateral cephalograms of patients with mandibular prognathism are used to evaluate the soft tissue profile prognosis given by the "dentofacial planner". As a result, the horizontal displacement of SLS (sulcus labrale superius) and Pg' (soft tissue pogion) in patients with a normal vertical dimension and additional LMF (labiomental fold) in persons with a marked overbite are calculated well. The horizontal changes of the other points analyzed as well as all vertical changes are not predicted satisfactorily in the momentary version 4.22 A (febr. 1989), which will be improved by the company.