Murugesan Arathi, Ramasamy Navaneethan, Harikrishnan Sruthi
Department of Orthodontics and Dentofacial Orthopedics, Saveetha Institute of Medical and Technical Sciences, Chennai, IND.
Cureus. 2024 Apr 11;16(4):e58077. doi: 10.7759/cureus.58077. eCollection 2024 Apr.
Alteration in facial soft tissue plays an important role in the esthetics of an individual. The first thing a patient wants from orthodontic treatment is how well he/she looks. The degree of soft tissue changes brought about by the retraction of teeth can be influenced by factors such as extraction pattern, muscle function, age, gender, weight, etc. Aim: The aim of the study was to compare post-orthodontic soft tissue changes among different facial growth patterns in orthodontic patients undergoing extraction of first premolar teeth.
Pre-treatment and post-treatment lateral cephalograms of 45 orthodontic patients who underwent therapeutic extraction of the first premolars were included in the study. They were divided into three equal groups based on their facial growth pattern, that is, average, horizontal, and vertical. Eight soft tissue cephalometric measurements were done in all the lateral cephalograms. Paired Student t-tests and analysis of variance (ANOVA) were conducted to statistically analyze the results. The significance level was set as 0.05.
The paired Student t-test showed a -value > 0.05 for lower anterior facial height in all three groups and for facial angle in vertical growers alone. ANOVA comparing the mean soft tissue changes among the three groups resulted in a -value > 0.05 for all the measured parameters.
Facial growth patterns do not influence the extent of soft tissue profile changes in orthodontic patients treated with extraction of first premolars.
面部软组织的改变在个体美学中起着重要作用。患者从正畸治疗中首先期望的是自己的容貌改善情况。牙齿内收所带来的软组织变化程度会受到拔牙模式、肌肉功能、年龄、性别、体重等因素的影响。目的：本研究的目的是比较拔除第一前磨牙的正畸患者中不同面部生长模式的正畸治疗后软组织变化情况。
本研究纳入了45例接受第一前磨牙治疗性拔除的正畸患者的治疗前和治疗后侧位头影测量片。根据面部生长模式将他们分为三组，即平均型、水平型和垂直型，每组人数相等。对所有侧位头影测量片进行八项软组织头影测量。采用配对t检验和方差分析（ANOVA）对结果进行统计学分析。显著性水平设定为0.05。
配对t检验显示，所有三组的下前面部高度以及仅垂直生长型患者的面部角度的p值均>0.05。比较三组间平均软组织变化的方差分析结果显示，所有测量参数的p值均>0.05。
面部生长模式不影响拔除第一前磨牙的正畸患者软组织侧貌变化的程度。
