Universidade do Sagrado Coração - Unisagrado, Orthodontic Department, Bauru, SP, Brazil.
Universidade do Norte do Paraná - Unopar, Orthodontic Department, Londrina, PR, Brazil.
Braz Oral Res. 2020 Jan 31;34:e003. doi: 10.1590/1807-3107bor-2020.vol34.0003. eCollection 2020.
This retrospective study evaluated facial profile pleasantness determined by two protocols of Class II treatment. The sample comprised facial profile silhouettes obtained retrospectively from the pretreatment (T1) and posttreatment (T2) cephalograms of 60 patients (42 males and 18 females) divided into two groups. One group of 30 patients (mean age of 12.84 years) was treated with the extraction of maxillary first premolars (mean treatment time of 2.7 years), and the other group of 30 patients (mean age of 12.81 years) was treated with a mandibular advancement appliance (Forsus) (mean treatment time of 2.49 years). The facial profile silhouettes (T1 and T2) were randomly distributed in an album containing one patient per sheet. The examiners consisted of 60 orthodontists and 60 lay individuals, who analyzed the profiles in regard to facial pleasantness, using the Likert scale. A comparison between stages T1 and T2 of the two treatment protocols and between the examiners was performed by mixed-design analysis of variance at a significance level of 5%. The results demonstrated a significant difference between T1 and T2 (greater scores for T2 compared to T1), and between lay individuals and orthodontists (orthodontists assigned higher scores), but with no significant difference between the treatment protocols. Both protocols produced positive effects on the facial profile esthetics, from the standpoint of lay individuals and orthodontists.
本回顾性研究评估了两种 II 类治疗方案对面部轮廓美观度的影响。该样本包括 60 名患者（42 名男性和 18 名女性）的面部轮廓侧位片，这些患者来自治疗前（T1）和治疗后（T2）的头颅侧位片。将这些患者分为两组，一组 30 名患者（平均年龄为 12.84 岁）接受上颌第一前磨牙拔牙矫治（平均治疗时间为 2.7 年），另一组 30 名患者（平均年龄为 12.81 岁）接受下颌前伸矫治器（ Forsus ）治疗（平均治疗时间为 2.49 年）。面部轮廓侧位片（T1 和 T2）随机分布在一本相册中，每页包含一位患者。检查者由 60 名正畸医生和 60 名普通大众组成，他们使用李克特量表对侧位片的美观度进行分析。通过混合设计方差分析，对两种治疗方案的 T1 和 T2 阶段以及检查者之间进行比较，显著水平为 5%。结果表明，两种治疗方案都显著改善了面部轮廓美观度（与 T1 相比，T2 的评分更高），并且普通大众和正畸医生之间也存在显著差异（正畸医生的评分更高），但两种治疗方案之间没有显著差异。从普通大众和正畸医生的角度来看，两种方案都对面部轮廓美观度产生了积极的影响。
