[Study on the cephalographic X-rays on the changes of the soft tissues of the face of growing patients after orthodontic treatment with functional appliances].

In this research we have examined cephalographic x rays concerning patients between 8 to 14 years to age (47 patients class II/1 according to Angle, 7 class II/2 and 17 class III) before treatment and two years later. The patients were still in the age of growth. In the 1st cephalographic x ray has also been made provisional of growth using the Ricketts method. In the three designs we have made measurements to examine the change of the soft tissues of the face especially the nose, owing to the treatment alone, excluding growth. Simultaneously to the two cephalographic x rays hand x rays have been taken to examine whether there was some special effect in the soft tissues during the different stages of growth. Considering now what we found out during this study, we come to the following results. 1) The angle SNSn (1) is effected by the treatment of the functional appliance type Bionator in the classes II/1 and II/2 and the angle of the nose (3) in class II/2 of the patients. 2) The distance A-A' is increased with the treatment in all malocclusions and its increase is statistically important in all the examined stages of growth. 3) The thickness of the upper lip is increased with the treatment in the II/1 malocclusions. The increase of this thickness is statistically important in the stages PP2 and MP3 of the skeletal growth. 4) The thickness of the lower lip increases with the III class treatment. 5) The thickness of the soft tissues round the chin increases with the treatment to patients in class II/1. This increase is statistically important in the stages S and MP3 cap of the skeletal growth.