Objective To investigate the influence of micro screw implant anchorage(MIA)technique in orthodontics on facial soft tissue profile of adolescents with Class Ⅱ malocclusion and analyze the related influencing factors.Methods 100 young patients with Class Ⅱ malocclusion admitted to the hospital from July 2018 to July 2020 were selected and divided into the control group(n=40)and the study group(n=60)according to different orthodontic treatment schemes.The visual analogue scale(VAS)scores and clinical efficacy were compared between the two groups before and after treatment.According to the improvement degree of the soft tissue profile after the treatment of Class Ⅱ malocclusion adolescents with oral orthodontic MIA technology,they were divided into high group(VAS score＞60 points)and low group(VAS score≤60 points).Univariate analysis was used to analyze the relevant influencing factors of facial soft tissue profile improvement in adolescents with ClassⅡ malocclusion.Logistic regression analysis was used to analyze the independent influencing factors on the improvement of facial soft tissue profile of adolescents with Class Ⅱ malocclusion.Pearson analyzed the correlation between facial soft tissue profile and its influencing factors in adolescents with Class Ⅱ malocclusion.Results After treatment,the VAS score of the study group was higher than that of the control group(P＜0.05).The total effective rate of the study group was higher than that of the control group(P＜0.05).Univariate analysis showed that there were significant differences between high and low groups in the angles of upper and lower lip protrusion,nasolabial angle,lower lip inclination,upper lip inclination,Z angle,upper lip E line distance(EP-UL),upper central incisor angle(U1-SN),upper and lower alveolar base angle(ANB)and upper alveolar base angle(SNA)(P＜0.05).Logistic regression analysis showed that the nasolabial angle and the inclination of the lower lip were independent risk factors for the improvement of the soft tissue profile after the orthodontic MIA treatment of Class Ⅱ malocclusion adolescents,and EP-ULwas an independent protective factor for the improvement of the soft tissue profile after the orthodontic MIA treatment of Class Ⅱ malocclusion adolescents(P＜0.05).Conclusion The orthodontic MIA technique can improve the facial soft tissue profile of young patients with Class Ⅱ malocclusion,and the clinical effect is better.In addition,the facial soft tissue profile of young patients with Class Ⅱ malocclusion with larger lower lip angle and nasolabial angle and smaller EP-UL may be easier to improve after MIA treatment.
关键词
安氏Ⅱ类错(牙合)畸形/口腔正畸/微种植体支抗/软组织侧貌/影响因素
Key words
Angle Class Ⅱ malocclusion/orthodontics/microscrew implant anchorage/soft tissue profile/influence factor
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