Correlation between Upper Lip Soft Tissue and Hard Tissue Position Changes of Different Age Female

doi:10.13701/j.cnki.kqyxyj.2020.08.015

Abstract

Abstract: Objective: To study upper lip soft tissue position changes of different age female after orthodontic retracting anterior teeth. Methods: 63 female orthodontic patients with protrusion anterior teeth were divided into adolescent group and adult group according to the age. Pre- and post-treatment cephalometric X-rays were performed, and 9 measurement items were measured. The correlations of the change values were analyzed. Results: After the treatment, the angle of U1-SN significantly reduced. The position of U1 incisal tip, U1 cervical point, upper lip sulcus, upper lip flange, and stomion superius significantly retracted. Upper lip length and thickness increased. The change values of position of upper lip flange and U1 cervical point had high-positive correlation, and the change values of position of stomion superius and U1 incisal tip had high-positive correlation. In adolescent group and adult group, the adduction ratio of the U1 incisor tip to stomion superius was 1∶0.54 and 1∶0.65, the adduction ratio of the U1 cervical point to upper lip flange was 1∶0.50 and 1∶0.79, respectively. Conclusion: The change values of position of upper lip flange and U1 cervical point had high-positive correlation, and the change values of position of stomion superius and U1 incisal tip had high-positive correlation.

Key words: upper lip, soft tissue, X ray cephalogram, correlation analysis

JIN Yunyi, ZHANG Linkun. Correlation between Upper Lip Soft Tissue and Hard Tissue Position Changes of Different Age Female[J]. Journal of Oral Science Research, 2020, 36(8): 766-769.

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