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Effekte des aktivators bei der klasse-II-1-therapie
(Urban & Vogel, 1987) Ülgen, M.; Schmuth, Gottfried P.F.
This study is based on pre- and posttreatment cephalographs of 30 girls and 30 boys with class II division 1 malocclusion who were treated with an activator. In order to determine the actual effect of the activator, the treatment group was compared to the control group from the growth study of Riolo et al. The significant effects of the activator were as follows: Decrease of the ANB angle, increase of the SNB angle, prevention of the decrease of the SN/occlusal plane angle and retrusion of the upper incisors.
Korrektur des tiefen Bisses mit der Edgewise-Technik
(Springer-Verlag, 1987) Ülgen, M.; Altuǧ, Z.
This study was based on 80 profile radiographs of 40 patients with increased overbite. 20 patients were treated (treatment group), the other 20 served as a control (untreated group). The radiographs were taken before and at the completion of this study. In order to ascertain whether changes in the treatment group were due to treatment or spontaneous growth, the two groups were compared. Overbite was reduced on average by 3.3 mm. One third of this reduction occurred as a result of spontaneous growth and the remaining two thirds due to treatment. The spontaneous overbite reduction was due to vertical alveolar growth of the upper molars. Reduction of overbite in the treatment group was mainly through extrusion of the lower molars.