Evaluation of the Effect of Premolar Extraction on Hard and Soft Tissue Profile Changes

Authors : Elif Albayrak, Aybüke Dilara Arslan, Neslihan Şenışık

Pages : 413-421

Doi:10.22312/sdusbed.1702714

View : 62 | Download : 157

Publication Date : 2025-12-22

Article Type : Research Paper

Abstract :Objectıve: To evaluate the hard and soft tissue profile changes in pre- and post-treatment cephalometric films in patients over 16 years of age who underwent maxillary two or four premolar tooth extraction. Materials and Methods: Cephalometric radiographs of 68 patients who completed orthodontic treatment were analyzed. Measurements were made on the records of 40 patients who had four first premolars extracted and 28 patients who had two upper premolars extracted. Pre-treatment (T1) and post-treatment (T2) values were compared. The Shapiro-Wilk test was used to evaluate the normal distribution of the data, and paired t-test and independent t-test were used for pre-treatment and post-treatment comparisons. The significance level was taken as p 0.05). The lower lip thickness increased in the two premolar extraction group (p<0.05). In the independent comparison of the parameters between the groups, there was no difference in the nasolabial angle between the two groups at T1, but it increased statistically at T2. The SNA angle decreased numerically in the four premolar extraction group, but increased in the two premolar extraction group. The nasolabial angle increased significantly in both groups. Conclusion: In both extraction groups, minimal profile change was achieved with lip retraction resulting from incisor retraction. Extraction treatment can be considered in cases where the lips are desired to move backward.
Keywords : Estetik, Premolar çekimi, Profil değişimi

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