EUROPEAN JOURNAL OF ORTHODONTICS, vol.31, no.4, pp.412-416, 2009 (SCI-Expanded)
The mean upper incisor intrusion was 1.92 mm and the mean overbite decrease 2.25 +/- 1.73 mm in 4.55 months. Upper incisor angulation resulted in a 1.81 +/- 3.84 degree change in U1-PP angle and a 1.22 +/- 3.64 degree change in U1-NA angle. However, these were not statistically significant (P > 0.05).