Background: The tooth movements were generally analyzed in two dimensions
on cephalometric radiographs. Nowaday, 3D digital model analysis, which does
not have any harmful effects on patients, can be used to evaluate the palatal
morphology and coronal tooth movements in a very comfortable and easy way.
Aims: To investigate the effect of palatal morphology on anchorage reinforcement
during intraoral molar distalization with pendulum appliance using 3D model
analysis. Materials and Methods: The material consisted of before (T0) and
after (T1) dental plaster models of Class II malocclusion patients (17 females,
3 males) treated with pendulum appliance for molar distalization and Nance
appliance for anchorage. T0 and T1 digital models were superimposed using the
palatal area as a reference via three points and surface‑matching software, and
the changes in teeth movement were calculated for left and right central incisors,
first premolars, and first and second molars. Palatal morphology was evaluated
at T0 on digital models as palatal inclination, palatal depth angles, and anterior
hard palate area. Wilcoxon test was used to evaluate the treatment results and
Spearman’s correlation analysis was performed to evaluate the relationship
between palatal morphology and dental movement. The upper limit for the level
of significance was taken as 0.05. Results: Mesial movement of first premolars
and distal movement of first and second molars were found to be statistically
significant (P < 0.001). A weak negative correlation was found between the
palatal inclination and the movement of first premolars (P < 0.045 and P < 0.003).
Palatal depth angles and anterior hard palate area had no correlation with dental
movements. Conclusion: Presented results supported that the mesial movement of
premolar teeth decreased as the inclination of the palate increased.