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6 - Evaluation of the lips positions in adolescent class I individuals according to gender
Ayla Kürkçüoğlu, Zekiye Karaca Bozdağ, Özkan Oğuz
Objective: Facial soft tissues and lip thickness are influenced by age, gender, race, juvenescence and growth. This aspect is particularly of interest to forensic anthropologists, dentists, and cosmetic surgeons. Plump and beautiful lips that are in harmony with other facial features are the most important esthetic symbols in enhancing the visuality of a woman. Actually, eyes constitute the most important focal point in the upper half of the face, whereas lips are the focal point in the lower half of the face. In this study, we aimed to evaluate the position of the upper and lower lips of a group in Turkish society by gender and to compare the findings with those of people of other races.
Materials and Methods: A total of 140 (68 women and 72 men) healthy individuals with Class I malocclusion (ANB angle 2°±2) participated in this study. The mean age of women and men was 23.2±4.2 years and 24.3±3.4 years, respectively. The distance between the three different points marked on soft tissue on lateral cephalometric radiograph images and the Ricketts E line were measured using Image-J software. Different statistical methods were utilized for the comparison of the distribution of the groups and measurement results. An associated p value of <0.05 was considered statistically significant.
Results: The distance of Ls (Labium superius)-E, Sto (Stomion)-E, and Li (Labium inferius)-E in women ranged between -3.21 mm and -16.08 mm, between 10.71 mm and -24.21 mm, and between -2.88 mm and -14.83 mm, respectively. The corresponding measurements in men were between -4.84 mm and -17.21 mm, between -13.21 mm and -23.43 mm, and between -3.21 mm and -11.12 mm, respectively. A statistically significant difference between men and women was observed only for the Li-E values (p=0.041).
Conclusion: Knowing the position of the lips, which constitute the focal point of the lower half of the face, will help orthodontists to predict the facial profile of patients at the end of the treatment. It may also aid forensic anthropologists in facial reconstruction and help cosmetic surgeons in predicting the lower face harmony after esthetic surgery.
Keywords: Position of the lips, Ricketts E line, cephalometry
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