Objective: To investigate characteristics of incisors inclination and dental compensation in normal occlusion and Angle's Class II division 1 malocclusion with different growth patterns.
Methods: 158 cephalometric films of normal occlusion and 246 cephalometric films of Angle's Class II division 1 malocclusion were selected and the data of relevant variables were compiled to analyze the inclination of incisors.
Results: The upper and lower incisors were lingually inclined in normal occlusion with vertical growth pattern while labially inclined in horizontal growth pattern. Compared with the average value of normal occlusion with different growth patterns, the upper incisors of Class II division 1 malocclusion were relatively labially inclined in different growth patterns and the lower incisors were labially inclined in vertical and average growth patterns, while there were no obvious changes in horizontal growth pattern.
Conclusion: When treating patients with Angle's Class II division 1 malocclusion, we should choose a specific method according to patients' growth patterns and characteristics of dental compensation.