The effect of modification of profile components on its attractiveness in patients with class II division 1 malocclusion following orthodontic camouflage

Abstract

Background and purpose: The aim of this study is to evaluate the effect of modification of profile components on its attractiveness in patients with class II division 1 malocclusion following orthodontic camouflage. Materials and methods: The image of an adult female patient and an adult male with class II division 1 occlusion with mandibular anterior-posterior deficiency will be selected from the orthodontic department of Tabriz Dental School. The researcher will change the profile features, which include nose tip, nasofrontal angle, cervical angle, and nasal hump, by Adobe Photoshop CC 2019 v20. In each case, three lip modes will be designed: without retraction, with minimum retraction, and with maximum retraction. The data obtained from the study will be analyzed by SPSS v20. The data obtained from the study were analyzed by SPSS version 22. First, the descriptive statistics parameters were calculated for each image, and then the possible difference between the images (in terms of attractiveness from the evaluators' point of view) was analyzed with repeated measures ANOVA or Freidman test. (Acceptable type 1 error in this study is assumed to be 0.05) Results: Among all the changes applied in the profile of patients with mandibular deficiency and independent of orthodontic treatment for upper lip retraction and retraction rate, nasal tip angle of 57 (low head nose), dorsal hump nose and saddle nose profiles showed the lowest score. Except for the increased nasal tip angle in men and women and the increased nasofrontal angle in women, camouflage treatment had no significant effect on profile attractiveness in the rest of the cases. Conclusion: It seems that camouflage treatment does not have a significant effect on the attractiveness of the profile for most patients with mandibular deficiency. A high head nose as well as an increased nasofrontal angle are both limitations for camouflage treatment or maximal lip retraction in female patients with mandibular deficiency. In men with mandible deficiencyand upturned nose, camouflage treatment with minimal retraction significantly increases the attractiveness of the profile.