ABSTRACT
The basis for the analysis were case records of the patients treated in the Orthodontics Department of the Institute of Stomatology, Medical Academy in Warsaw, in the years 1980-1986, plaster models, radiological and photographic documentation. For a more detailed analysis of the material the extracted teeth, the orthodontic devices used in the treatment, the active elements used for displacing of teeth, and the duration and course of the treatment were considered. The analysis of the presented material shows that the treatment with extraction of permanent teeth as a basic procedure gave satisfactory results in cases of anomalies of teeth. In other cases it could be an adjuvant method used as a stage of the treatment and to reduce the time of treatment.
