[Spontaneous regulation of crowding in the region of canines after the extraction of premolars].

Crowding in the dental arch is an indication for planned extraction of the appropriate teeth, provided that this is accomplished on time. The authors describe a case where extraction of both upper premolars was to be followed by treatment with a monomaxillary plate. After the extraction the patient was unable to attend for further treatment. When he returned three month later, spontaneous regulation had already occurred. The final outcome is illustrated by photographs.